Kailua, Big Island weather by month

Check out Kailua, Big Island weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in Kailua, Big Island (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
20°C maximum daytime temperature in January in Kailua, Big Island20
20°C maximum daytime temperature in February in Kailua, Big Island20
20°C maximum daytime temperature in March in Kailua, Big Island20
20°C maximum daytime temperature in April in Kailua, Big Island20
21°C maximum daytime temperature in May in Kailua, Big Island21
22°C maximum daytime temperature in June in Kailua, Big Island22
23°C maximum daytime temperature in July in Kailua, Big Island23
23°C maximum daytime temperature in August in Kailua, Big Island23
23°C maximum daytime temperature in September in Kailua, Big Island23
22°C maximum daytime temperature in October in Kailua, Big Island22
21°C maximum daytime temperature in November in Kailua, Big Island21
21°C maximum daytime temperature in December in Kailua, Big Island21
Min temperature (night-time)
12°C minimum night-time temperature in January in Kailua, Big Island12
11°C minimum night-time temperature in February in Kailua, Big Island11
12°C minimum night-time temperature in March in Kailua, Big Island12
13°C minimum night-time temperature in April in Kailua, Big Island13
13°C minimum night-time temperature in May in Kailua, Big Island13
14°C minimum night-time temperature in June in Kailua, Big Island14
15°C minimum night-time temperature in July in Kailua, Big Island15
15°C minimum night-time temperature in August in Kailua, Big Island15
15°C minimum night-time temperature in September in Kailua, Big Island15
14°C minimum night-time temperature in October in Kailua, Big Island14
14°C minimum night-time temperature in November in Kailua, Big Island14
12°C minimum night-time temperature in December in Kailua, Big Island12
Heat & Humidity
Low heat & humidity in January in Kailua, Big IslandL
Low heat & humidity in February in Kailua, Big IslandL
Low heat & humidity in March in Kailua, Big IslandL
Low heat & humidity in April in Kailua, Big IslandL
Low heat & humidity in May in Kailua, Big IslandL
Moderate heat & humidity in June in Kailua, Big IslandM
Moderate heat & humidity in July in Kailua, Big IslandM
Moderate heat & humidity in August in Kailua, Big IslandM
Moderate heat & humidity in September in Kailua, Big IslandM
Moderate heat & humidity in October in Kailua, Big IslandM
Moderate heat & humidity in November in Kailua, Big IslandM
Low heat & humidity in December in Kailua, Big IslandL
Sea temperature
25°C sea temperature in January in Kailua, Big Island25
25°C sea temperature in February in Kailua, Big Island25
25°C sea temperature in March in Kailua, Big Island25
25°C sea temperature in April in Kailua, Big Island25
25°C sea temperature in May in Kailua, Big Island25
26°C sea temperature in June in Kailua, Big Island26
26°C sea temperature in July in Kailua, Big Island26
27°C sea temperature in August in Kailua, Big Island27
27°C sea temperature in September in Kailua, Big Island27
27°C sea temperature in October in Kailua, Big Island27
26°C sea temperature in November in Kailua, Big Island26
26°C sea temperature in December in Kailua, Big Island26

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & UV index in Kailua, Big Island

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of daylight
11 hours of daylight per day in January in Kailua, Big Island11
12 hours of daylight per day in February in Kailua, Big Island12
12 hours of daylight per day in March in Kailua, Big Island12
13 hours of daylight per day in April in Kailua, Big Island13
13 hours of daylight per day in May in Kailua, Big Island13
13 hours of daylight per day in June in Kailua, Big Island13
13 hours of daylight per day in July in Kailua, Big Island13
13 hours of daylight per day in August in Kailua, Big Island13
12 hours of daylight per day in September in Kailua, Big Island12
12 hours of daylight per day in October in Kailua, Big Island12
11 hours of daylight per day in November in Kailua, Big Island11
11 hours of daylight per day in December in Kailua, Big Island11
UV Index (Maximum)
UV (maximum) index 8 (Very High) in January in Kailua, Big Island8
UV (maximum) index 10 (Very High) in February in Kailua, Big Island10
UV (maximum) index 11+ (Extreme) in March in Kailua, Big Island11
UV (maximum) index 11+ (Extreme) in April in Kailua, Big Island11
UV (maximum) index 11+ (Extreme) in May in Kailua, Big Island11
UV (maximum) index 11+ (Extreme) in June in Kailua, Big Island11
UV (maximum) index 11+ (Extreme) in July in Kailua, Big Island11
UV (maximum) index 11+ (Extreme) in August in Kailua, Big Island11
UV (maximum) index 11+ (Extreme) in September in Kailua, Big Island11
UV (maximum) index 10 (Very High) in October in Kailua, Big Island10
UV (maximum) index 8 (Very High) in November in Kailua, Big Island8
UV (maximum) index 7 (High) in December in Kailua, Big Island7

Rainfall in Kailua, Big Island

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
13 days with some rainfall in January in Kailua, Big Island13
13 days with some rainfall in February in Kailua, Big Island13
16 days with some rainfall in March in Kailua, Big Island16
16 days with some rainfall in April in Kailua, Big Island16
15 days with some rainfall in May in Kailua, Big Island15
15 days with some rainfall in June in Kailua, Big Island15
17 days with some rainfall in July in Kailua, Big Island17
17 days with some rainfall in August in Kailua, Big Island17
15 days with some rainfall in September in Kailua, Big Island15
16 days with some rainfall in October in Kailua, Big Island16
15 days with some rainfall in November in Kailua, Big Island15
14 days with some rainfall in December in Kailua, Big Island14
Average monthly rainfall (mm)
58 mm monthly rainfall in January in Kailua, Big Island58
40 mm monthly rainfall in February in Kailua, Big Island40
43 mm monthly rainfall in March in Kailua, Big Island43
64 mm monthly rainfall in April in Kailua, Big Island64
59 mm monthly rainfall in May in Kailua, Big Island59
52 mm monthly rainfall in June in Kailua, Big Island52
58 mm monthly rainfall in July in Kailua, Big Island58
50 mm monthly rainfall in August in Kailua, Big Island50
54 mm monthly rainfall in September in Kailua, Big Island54
46 mm monthly rainfall in October in Kailua, Big Island46
35 mm monthly rainfall in November in Kailua, Big Island35
40 mm monthly rainfall in December in Kailua, Big Island40

More about Kailua, Big Island

Kailua, Big Island by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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The climate guide for Hawaii (Kailua, Big Island) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Kailua, Big Island?

Kailua, Big Island has a hot tropical climate with a winter dry season.

Kailua, Big Island weather in January

Expect daytime maximum temperatures of 20°C in Kailua, Big Island, Hawaii in January based on long-term weather averages. There are 13 days with some rainfall and typically 58 mm of rainfall in the month.

  • 20°C maximum daytime temperature in January in Kailua, Big Island20
    20°C max day temperature
  • 13 days with some rainfall in January in Kailua, Big Island13
    13 days with some rainfall
  • 12°C minimum night-time temperature in January in Kailua, Big Island12
    12°C min night temperature
  • 11 hours of daylight per day in January in Kailua, Big Island11
    11 hours of daylight per day
  • Low heat & humidity in January in Kailua, Big IslandL
    Low heat & humidity
  • 58 mm monthly rainfall in January in Kailua, Big Island58
    58 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in January in Kailua, Big Island8
    8 (Very High) UV index
  • 25°C sea temperature in January in Kailua, Big Island25
    25°C sea temperature

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Kailua, Big Island weather in February

Expect daytime maximum temperatures of 20°C in Kailua, Big Island, Hawaii in February based on long-term weather averages. There are 13 days with some rainfall and typically 40 mm of rainfall in the month.

  • 20°C maximum daytime temperature in February in Kailua, Big Island20
    20°C max day temperature
  • 13 days with some rainfall in February in Kailua, Big Island13
    13 days with some rainfall
  • 11°C minimum night-time temperature in February in Kailua, Big Island11
    11°C min night temperature
  • 12 hours of daylight per day in February in Kailua, Big Island12
    12 hours of daylight per day
  • Low heat & humidity in February in Kailua, Big IslandL
    Low heat & humidity
  • 40 mm monthly rainfall in February in Kailua, Big Island40
    40 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in February in Kailua, Big Island10
    10 (Very High) UV index
  • 25°C sea temperature in February in Kailua, Big Island25
    25°C sea temperature

Back to months

Kailua, Big Island weather in March

Expect daytime maximum temperatures of 20°C in Kailua, Big Island, Hawaii in March based on long-term weather averages. There are 16 days with some rainfall and typically 43 mm of rainfall in the month.

  • 20°C maximum daytime temperature in March in Kailua, Big Island20
    20°C max day temperature
  • 16 days with some rainfall in March in Kailua, Big Island16
    16 days with some rainfall
  • 12°C minimum night-time temperature in March in Kailua, Big Island12
    12°C min night temperature
  • 12 hours of daylight per day in March in Kailua, Big Island12
    12 hours of daylight per day
  • Low heat & humidity in March in Kailua, Big IslandL
    Low heat & humidity
  • 43 mm monthly rainfall in March in Kailua, Big Island43
    43 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in March in Kailua, Big Island11
    11+ (Extreme) UV index
  • 25°C sea temperature in March in Kailua, Big Island25
    25°C sea temperature

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Kailua, Big Island weather in April

Expect daytime maximum temperatures of 20°C in Kailua, Big Island, Hawaii in April based on long-term weather averages. There are 16 days with some rainfall and typically 64 mm of rainfall in the month.

  • 20°C maximum daytime temperature in April in Kailua, Big Island20
    20°C max day temperature
  • 16 days with some rainfall in April in Kailua, Big Island16
    16 days with some rainfall
  • 13°C minimum night-time temperature in April in Kailua, Big Island13
    13°C min night temperature
  • 13 hours of daylight per day in April in Kailua, Big Island13
    13 hours of daylight per day
  • Low heat & humidity in April in Kailua, Big IslandL
    Low heat & humidity
  • 64 mm monthly rainfall in April in Kailua, Big Island64
    64 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in April in Kailua, Big Island11
    11+ (Extreme) UV index
  • 25°C sea temperature in April in Kailua, Big Island25
    25°C sea temperature

Back to months

Kailua, Big Island weather in May

Expect daytime maximum temperatures of 21°C in Kailua, Big Island, Hawaii in May based on long-term weather averages. There are 15 days with some rainfall and typically 59 mm of rainfall in the month.

  • 21°C maximum daytime temperature in May in Kailua, Big Island21
    21°C max day temperature
  • 15 days with some rainfall in May in Kailua, Big Island15
    15 days with some rainfall
  • 13°C minimum night-time temperature in May in Kailua, Big Island13
    13°C min night temperature
  • 13 hours of daylight per day in May in Kailua, Big Island13
    13 hours of daylight per day
  • Low heat & humidity in May in Kailua, Big IslandL
    Low heat & humidity
  • 59 mm monthly rainfall in May in Kailua, Big Island59
    59 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in May in Kailua, Big Island11
    11+ (Extreme) UV index
  • 25°C sea temperature in May in Kailua, Big Island25
    25°C sea temperature

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Kailua, Big Island weather in June

Expect daytime maximum temperatures of 22°C in Kailua, Big Island, Hawaii in June based on long-term weather averages. There are 15 days with some rainfall and typically 52 mm of rainfall in the month.

  • 22°C maximum daytime temperature in June in Kailua, Big Island22
    22°C max day temperature
  • 15 days with some rainfall in June in Kailua, Big Island15
    15 days with some rainfall
  • 14°C minimum night-time temperature in June in Kailua, Big Island14
    14°C min night temperature
  • 13 hours of daylight per day in June in Kailua, Big Island13
    13 hours of daylight per day
  • Moderate heat & humidity in June in Kailua, Big IslandM
    Moderate heat & humidity
  • 52 mm monthly rainfall in June in Kailua, Big Island52
    52 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in June in Kailua, Big Island11
    11+ (Extreme) UV index
  • 26°C sea temperature in June in Kailua, Big Island26
    26°C sea temperature

Back to months

Kailua, Big Island weather in July

Expect daytime maximum temperatures of 23°C in Kailua, Big Island, Hawaii in July based on long-term weather averages. There are 17 days with some rainfall and typically 58 mm of rainfall in the month.

  • 23°C maximum daytime temperature in July in Kailua, Big Island23
    23°C max day temperature
  • 17 days with some rainfall in July in Kailua, Big Island17
    17 days with some rainfall
  • 15°C minimum night-time temperature in July in Kailua, Big Island15
    15°C min night temperature
  • 13 hours of daylight per day in July in Kailua, Big Island13
    13 hours of daylight per day
  • Moderate heat & humidity in July in Kailua, Big IslandM
    Moderate heat & humidity
  • 58 mm monthly rainfall in July in Kailua, Big Island58
    58 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in July in Kailua, Big Island11
    11+ (Extreme) UV index
  • 26°C sea temperature in July in Kailua, Big Island26
    26°C sea temperature

Back to months

Kailua, Big Island weather in August

Expect daytime maximum temperatures of 23°C in Kailua, Big Island, Hawaii in August based on long-term weather averages. There are 17 days with some rainfall and typically 50 mm of rainfall in the month.

  • 23°C maximum daytime temperature in August in Kailua, Big Island23
    23°C max day temperature
  • 17 days with some rainfall in August in Kailua, Big Island17
    17 days with some rainfall
  • 15°C minimum night-time temperature in August in Kailua, Big Island15
    15°C min night temperature
  • 13 hours of daylight per day in August in Kailua, Big Island13
    13 hours of daylight per day
  • Moderate heat & humidity in August in Kailua, Big IslandM
    Moderate heat & humidity
  • 50 mm monthly rainfall in August in Kailua, Big Island50
    50 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in August in Kailua, Big Island11
    11+ (Extreme) UV index
  • 27°C sea temperature in August in Kailua, Big Island27
    27°C sea temperature

Back to months

Kailua, Big Island weather in September

Expect daytime maximum temperatures of 23°C in Kailua, Big Island, Hawaii in September based on long-term weather averages. There are 15 days with some rainfall and typically 54 mm of rainfall in the month.

  • 23°C maximum daytime temperature in September in Kailua, Big Island23
    23°C max day temperature
  • 15 days with some rainfall in September in Kailua, Big Island15
    15 days with some rainfall
  • 15°C minimum night-time temperature in September in Kailua, Big Island15
    15°C min night temperature
  • 12 hours of daylight per day in September in Kailua, Big Island12
    12 hours of daylight per day
  • Moderate heat & humidity in September in Kailua, Big IslandM
    Moderate heat & humidity
  • 54 mm monthly rainfall in September in Kailua, Big Island54
    54 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Kailua, Big Island11
    11+ (Extreme) UV index
  • 27°C sea temperature in September in Kailua, Big Island27
    27°C sea temperature

Back to months

Kailua, Big Island weather in October

Expect daytime maximum temperatures of 22°C in Kailua, Big Island, Hawaii in October based on long-term weather averages. There are 16 days with some rainfall and typically 46 mm of rainfall in the month.

  • 22°C maximum daytime temperature in October in Kailua, Big Island22
    22°C max day temperature
  • 16 days with some rainfall in October in Kailua, Big Island16
    16 days with some rainfall
  • 14°C minimum night-time temperature in October in Kailua, Big Island14
    14°C min night temperature
  • 12 hours of daylight per day in October in Kailua, Big Island12
    12 hours of daylight per day
  • Moderate heat & humidity in October in Kailua, Big IslandM
    Moderate heat & humidity
  • 46 mm monthly rainfall in October in Kailua, Big Island46
    46 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in October in Kailua, Big Island10
    10 (Very High) UV index
  • 27°C sea temperature in October in Kailua, Big Island27
    27°C sea temperature

Back to months

Kailua, Big Island weather in November

Expect daytime maximum temperatures of 21°C in Kailua, Big Island, Hawaii in November based on long-term weather averages. There are 15 days with some rainfall.

  • 21°C maximum daytime temperature in November in Kailua, Big Island21
    21°C max day temperature
  • 15 days with some rainfall in November in Kailua, Big Island15
    15 days with some rainfall
  • 14°C minimum night-time temperature in November in Kailua, Big Island14
    14°C min night temperature
  • 11 hours of daylight per day in November in Kailua, Big Island11
    11 hours of daylight per day
  • Moderate heat & humidity in November in Kailua, Big IslandM
    Moderate heat & humidity
  • 35 mm monthly rainfall in November in Kailua, Big Island35
    35 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in November in Kailua, Big Island8
    8 (Very High) UV index
  • 26°C sea temperature in November in Kailua, Big Island26
    26°C sea temperature

Back to months

Kailua, Big Island weather in December

Expect daytime maximum temperatures of 21°C in Kailua, Big Island, Hawaii in December based on long-term weather averages. There are 14 days with some rainfall and typically 40 mm of rainfall in the month.

  • 21°C maximum daytime temperature in December in Kailua, Big Island21
    21°C max day temperature
  • 14 days with some rainfall in December in Kailua, Big Island14
    14 days with some rainfall
  • 12°C minimum night-time temperature in December in Kailua, Big Island12
    12°C min night temperature
  • 11 hours of daylight per day in December in Kailua, Big Island11
    11 hours of daylight per day
  • Low heat & humidity in December in Kailua, Big IslandL
    Low heat & humidity
  • 40 mm monthly rainfall in December in Kailua, Big Island40
    40 mm of monthly rainfall
  • UV (maximum) index 7 (High) in December in Kailua, Big Island7
    7 (High) UV index
  • 26°C sea temperature in December in Kailua, Big Island26
    26°C sea temperature

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More about Kailua, Big Island

Kailua, Big Island by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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The climate guide for Hawaii (Kailua, Big Island) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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Compare Kailua, Big Island weather with the UK

The weather chart below compares the average monthly maximum daytime temperature for Kailua, Big Island, Hawaii, USA and the UK (London).

Maximum daytime temperature (°C)

Kailua, Big Island, Hawaii, USA
UK (London)
20
7
20
7
20
10
20
13
21
17
22
20
23
22
23
22
23
19
22
15
21
10
21
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C / mm)  |  Imperial (°F / inches)

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