Galena weather by month

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

Temperature in Galena (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
-3°C maximum daytime temperature in January in Galena-3
0°C maximum daytime temperature in February in Galena0
7°C maximum daytime temperature in March in Galena7
15°C maximum daytime temperature in April in Galena15
21°C maximum daytime temperature in May in Galena21
27°C maximum daytime temperature in June in Galena27
29°C maximum daytime temperature in July in Galena29
27°C maximum daytime temperature in August in Galena27
23°C maximum daytime temperature in September in Galena23
17°C maximum daytime temperature in October in Galena17
8°C maximum daytime temperature in November in Galena8
-1°C maximum daytime temperature in December in Galena-1
Min temperature (night-time)
-14°C minimum night-time temperature in January in Galena-14
-11°C minimum night-time temperature in February in Galena-11
-4°C minimum night-time temperature in March in Galena-4
3°C minimum night-time temperature in April in Galena3
9°C minimum night-time temperature in May in Galena9
13°C minimum night-time temperature in June in Galena13
16°C minimum night-time temperature in July in Galena16
15°C minimum night-time temperature in August in Galena15
10°C minimum night-time temperature in September in Galena10
4°C minimum night-time temperature in October in Galena4
-3°C minimum night-time temperature in November in Galena-3
-10°C minimum night-time temperature in December in Galena-10
Heat & Humidity
No heat & humidity in January in Galena0
No heat & humidity in February in Galena0
No heat & humidity in March in Galena0
No heat & humidity in April in Galena0
No heat & humidity in May in Galena0
Low heat & humidity in June in GalenaL
Moderate heat & humidity in July in GalenaM
Low heat & humidity in August in GalenaL
No heat & humidity in September in Galena0
No heat & humidity in October in Galena0
No heat & humidity in November in Galena0
No heat & humidity in December in Galena0

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

Sunshine & UV index in Galena

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
9 hours of daylight per day in January in Galena9
11 hours of daylight per day in February in Galena11
12 hours of daylight per day in March in Galena12
13 hours of daylight per day in April in Galena13
15 hours of daylight per day in May in Galena15
15 hours of daylight per day in June in Galena15
15 hours of daylight per day in July in Galena15
14 hours of daylight per day in August in Galena14
12 hours of daylight per day in September in Galena12
11 hours of daylight per day in October in Galena11
10 hours of daylight per day in November in Galena10
9 hours of daylight per day in December in Galena9
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Galena1
UV (maximum) index 2 (Low) in February in Galena2
UV (maximum) index 4 (Moderate) in March in Galena4
UV (maximum) index 6 (High) in April in Galena6
UV (maximum) index 7 (High) in May in Galena7
UV (maximum) index 9 (Very High) in June in Galena9
UV (maximum) index 9 (Very High) in July in Galena9
UV (maximum) index 8 (Very High) in August in Galena8
UV (maximum) index 6 (High) in September in Galena6
UV (maximum) index 4 (Moderate) in October in Galena4
UV (maximum) index 2 (Low) in November in Galena2
UV (maximum) index 1 (Low) in December in Galena1

Rainfall in Galena

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
9 days with some rainfall in January in Galena9
8 days with some rainfall in February in Galena8
11 days with some rainfall in March in Galena11
12 days with some rainfall in April in Galena12
11 days with some rainfall in May in Galena11
10 days with some rainfall in June in Galena10
10 days with some rainfall in July in Galena10
9 days with some rainfall in August in Galena9
9 days with some rainfall in September in Galena9
9 days with some rainfall in October in Galena9
9 days with some rainfall in November in Galena9
10 days with some rainfall in December in Galena10
Average monthly rainfall (mm)
31 mm monthly rainfall in January in Galena31
31 mm monthly rainfall in February in Galena31
63 mm monthly rainfall in March in Galena63
87 mm monthly rainfall in April in Galena87
98 mm monthly rainfall in May in Galena98
109 mm monthly rainfall in June in Galena109
101 mm monthly rainfall in July in Galena101
111 mm monthly rainfall in August in Galena111
103 mm monthly rainfall in September in Galena103
66 mm monthly rainfall in October in Galena66
62 mm monthly rainfall in November in Galena62
46 mm monthly rainfall in December in Galena46

More about Galena

Galena by month

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

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The climate guide for Illinois (Galena) 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 Galena?

Galena has a cold climate with hot summers and some rainfall in all months.

Galena weather in January

Expect daytime maximum temperatures of -3°C in Galena, Illinois in January based on long-term weather averages. There are 5 hours of sunshine per day on average, which might fall as snow.

  • -3°C maximum daytime temperature in January in Galena-3
    -3°C max day temperature
  • 5 hours of sunshine per day
  • 9 days with some rainfall in January in Galena9
    9 days with some rainfall
  • -14°C minimum night-time temperature in January in Galena-14
    -14°C min night temperature
  • 9 hours of daylight per day in January in Galena9
    9 hours of daylight per day
  • No heat & humidity in January in Galena0
    No heat & humidity
  • 31 mm monthly rainfall in January in Galena31
    31 mm of monthly rainfall
  • UV (maximum) index 1 (Low) in January in Galena1
    1 (Low) UV index

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Galena weather in February

Expect daytime maximum temperatures of 0°C in Galena, Illinois in February based on long-term weather averages. There are 7 hours of sunshine per day on average, which might fall as snow.

  • 0°C maximum daytime temperature in February in Galena0
    0°C max day temperature
  • 7 hours of sunshine per day
  • 8 days with some rainfall in February in Galena8
    8 days with some rainfall
  • -11°C minimum night-time temperature in February in Galena-11
    -11°C min night temperature
  • 11 hours of daylight per day in February in Galena11
    11 hours of daylight per day
  • No heat & humidity in February in Galena0
    No heat & humidity
  • 31 mm monthly rainfall in February in Galena31
    31 mm of monthly rainfall
  • UV (maximum) index 2 (Low) in February in Galena2
    2 (Low) UV index

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Galena weather in March

Expect daytime maximum temperatures of 7°C in Galena, Illinois in March based on long-term weather averages. There are 7 hours of sunshine per day on average with 11 days with some rainfall and typically 63 mm of rainfall in the month.

  • 7°C maximum daytime temperature in March in Galena7
    7°C max day temperature
  • 7 hours of sunshine per day
  • 11 days with some rainfall in March in Galena11
    11 days with some rainfall
  • -4°C minimum night-time temperature in March in Galena-4
    -4°C min night temperature
  • 12 hours of daylight per day in March in Galena12
    12 hours of daylight per day
  • No heat & humidity in March in Galena0
    No heat & humidity
  • 63 mm monthly rainfall in March in Galena63
    63 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in March in Galena4
    4 (Moderate) UV index

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Galena weather in April

Expect daytime maximum temperatures of 15°C in Galena, Illinois in April based on long-term weather averages. There are 8 hours of sunshine per day on average with 12 days with some rainfall and typically 87 mm of rainfall in the month.

  • 15°C maximum daytime temperature in April in Galena15
    15°C max day temperature
  • 8 hours of sunshine per day
  • 12 days with some rainfall in April in Galena12
    12 days with some rainfall
  • 3°C minimum night-time temperature in April in Galena3
    3°C min night temperature
  • 13 hours of daylight per day in April in Galena13
    13 hours of daylight per day
  • No heat & humidity in April in Galena0
    No heat & humidity
  • 87 mm monthly rainfall in April in Galena87
    87 mm of monthly rainfall
  • UV (maximum) index 6 (High) in April in Galena6
    6 (High) UV index

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Galena weather in May

Expect daytime maximum temperatures of 21°C in Galena, Illinois in May based on long-term weather averages. There are 10 hours of sunshine per day on average with 11 days with some rainfall and typically 98 mm of rainfall in the month.

  • 21°C maximum daytime temperature in May in Galena21
    21°C max day temperature
  • 10 hours of sunshine per day
  • 11 days with some rainfall in May in Galena11
    11 days with some rainfall
  • 9°C minimum night-time temperature in May in Galena9
    9°C min night temperature
  • 15 hours of daylight per day in May in Galena15
    15 hours of daylight per day
  • No heat & humidity in May in Galena0
    No heat & humidity
  • 98 mm monthly rainfall in May in Galena98
    98 mm of monthly rainfall
  • UV (maximum) index 7 (High) in May in Galena7
    7 (High) UV index

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Galena weather in June

Expect daytime maximum temperatures of 27°C in Galena, Illinois in June based on long-term weather averages. There are 10 hours of sunshine per day on average with 10 days with some rainfall and typically 109 mm of rainfall in the month.

  • 27°C maximum daytime temperature in June in Galena27
    27°C max day temperature
  • 10 hours of sunshine per day
  • 10 days with some rainfall in June in Galena10
    10 days with some rainfall
  • 13°C minimum night-time temperature in June in Galena13
    13°C min night temperature
  • 15 hours of daylight per day in June in Galena15
    15 hours of daylight per day
  • Low heat & humidity in June in GalenaL
    Low heat & humidity
  • 109 mm monthly rainfall in June in Galena109
    109 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in June in Galena9
    9 (Very High) UV index

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Galena weather in July

Expect daytime maximum temperatures of 29°C in Galena, Illinois in July based on long-term weather averages. There are 10 hours of sunshine per day on average with 10 days with some rainfall and typically 101 mm of rainfall in the month.

  • 29°C maximum daytime temperature in July in Galena29
    29°C max day temperature
  • 10 hours of sunshine per day
  • 10 days with some rainfall in July in Galena10
    10 days with some rainfall
  • 16°C minimum night-time temperature in July in Galena16
    16°C min night temperature
  • 15 hours of daylight per day in July in Galena15
    15 hours of daylight per day
  • Moderate heat & humidity in July in GalenaM
    Moderate heat & humidity
  • 101 mm monthly rainfall in July in Galena101
    101 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in July in Galena9
    9 (Very High) UV index

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Galena weather in August

Expect daytime maximum temperatures of 27°C in Galena, Illinois in August based on long-term weather averages. There are 10 hours of sunshine per day on average with typically 111 mm of rainfall in the month.

  • 27°C maximum daytime temperature in August in Galena27
    27°C max day temperature
  • 10 hours of sunshine per day
  • 9 days with some rainfall in August in Galena9
    9 days with some rainfall
  • 15°C minimum night-time temperature in August in Galena15
    15°C min night temperature
  • 14 hours of daylight per day in August in Galena14
    14 hours of daylight per day
  • Low heat & humidity in August in GalenaL
    Low heat & humidity
  • 111 mm monthly rainfall in August in Galena111
    111 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in Galena8
    8 (Very High) UV index

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Galena weather in September

Expect daytime maximum temperatures of 23°C in Galena, Illinois in September based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 103 mm of rainfall in the month.

  • 23°C maximum daytime temperature in September in Galena23
    23°C max day temperature
  • 8 hours of sunshine per day
  • 9 days with some rainfall in September in Galena9
    9 days with some rainfall
  • 10°C minimum night-time temperature in September in Galena10
    10°C min night temperature
  • 12 hours of daylight per day in September in Galena12
    12 hours of daylight per day
  • No heat & humidity in September in Galena0
    No heat & humidity
  • 103 mm monthly rainfall in September in Galena103
    103 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Galena6
    6 (High) UV index

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Galena weather in October

Expect daytime maximum temperatures of 17°C in Galena, Illinois in October based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 66 mm of rainfall in the month.

  • 17°C maximum daytime temperature in October in Galena17
    17°C max day temperature
  • 7 hours of sunshine per day
  • 9 days with some rainfall in October in Galena9
    9 days with some rainfall
  • 4°C minimum night-time temperature in October in Galena4
    4°C min night temperature
  • 11 hours of daylight per day in October in Galena11
    11 hours of daylight per day
  • No heat & humidity in October in Galena0
    No heat & humidity
  • 66 mm monthly rainfall in October in Galena66
    66 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in October in Galena4
    4 (Moderate) UV index

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Galena weather in November

Expect daytime maximum temperatures of 8°C in Galena, Illinois in November based on long-term weather averages. There are 4 hours of sunshine per day on average with typically 62 mm of rainfall in the month.

  • 8°C maximum daytime temperature in November in Galena8
    8°C max day temperature
  • 4 hours of sunshine per day
  • 9 days with some rainfall in November in Galena9
    9 days with some rainfall
  • -3°C minimum night-time temperature in November in Galena-3
    -3°C min night temperature
  • 10 hours of daylight per day in November in Galena10
    10 hours of daylight per day
  • No heat & humidity in November in Galena0
    No heat & humidity
  • 62 mm monthly rainfall in November in Galena62
    62 mm of monthly rainfall
  • UV (maximum) index 2 (Low) in November in Galena2
    2 (Low) UV index

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Galena weather in December

Expect daytime maximum temperatures of -1°C in Galena, Illinois in December based on long-term weather averages. There are 4 hours of sunshine per day on average with 10 days with some rainfall and typically 46 mm of rainfall in the month, which might fall as snow.

  • -1°C maximum daytime temperature in December in Galena-1
    -1°C max day temperature
  • 4 hours of sunshine per day
  • 10 days with some rainfall in December in Galena10
    10 days with some rainfall
  • -10°C minimum night-time temperature in December in Galena-10
    -10°C min night temperature
  • 9 hours of daylight per day in December in Galena9
    9 hours of daylight per day
  • No heat & humidity in December in Galena0
    No heat & humidity
  • 46 mm monthly rainfall in December in Galena46
    46 mm of monthly rainfall
  • UV (maximum) index 1 (Low) in December in Galena1
    1 (Low) UV index

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More about Galena

Galena by month

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

Recommended for Illinois

  • Explore latest special offers & online deals from TUI
  • Free child places & £0 deposits with direct debit available
  • Book summer & winter sun holidays in 2026/2027

TUITUI deal finder

The climate guide for Illinois (Galena) 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.

Compare Galena weather with the UK

The weather chart below compares the average monthly maximum daytime temperature for Galena, Illinois, USA and the UK (London).

Maximum daytime temperature (°C)

Galena, Illinois, USA
UK (London)
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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

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