Monmouth weather by month

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

Temperature in Monmouth (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
45°F maximum daytime temperature in January in Monmouth45
45°F maximum daytime temperature in February in Monmouth45
48°F maximum daytime temperature in March in Monmouth48
54°F maximum daytime temperature in April in Monmouth54
61°F maximum daytime temperature in May in Monmouth61
66°F maximum daytime temperature in June in Monmouth66
70°F maximum daytime temperature in July in Monmouth70
68°F maximum daytime temperature in August in Monmouth68
64°F maximum daytime temperature in September in Monmouth64
57°F maximum daytime temperature in October in Monmouth57
50°F maximum daytime temperature in November in Monmouth50
45°F maximum daytime temperature in December in Monmouth45
Min temperature (night-time)
34°F minimum night-time temperature in January in Monmouth34
34°F minimum night-time temperature in February in Monmouth34
36°F minimum night-time temperature in March in Monmouth36
39°F minimum night-time temperature in April in Monmouth39
45°F minimum night-time temperature in May in Monmouth45
50°F minimum night-time temperature in June in Monmouth50
52°F minimum night-time temperature in July in Monmouth52
52°F minimum night-time temperature in August in Monmouth52
48°F minimum night-time temperature in September in Monmouth48
45°F minimum night-time temperature in October in Monmouth45
39°F minimum night-time temperature in November in Monmouth39
36°F minimum night-time temperature in December in Monmouth36
Heat & Humidity
No heat & humidity in January in Monmouth0
No heat & humidity in February in Monmouth0
No heat & humidity in March in Monmouth0
No heat & humidity in April in Monmouth0
No heat & humidity in May in Monmouth0
No heat & humidity in June in Monmouth0
No heat & humidity in July in Monmouth0
No heat & humidity in August in Monmouth0
No heat & humidity in September in Monmouth0
No heat & humidity in October in Monmouth0
No heat & humidity in November in Monmouth0
No heat & humidity in December in Monmouth0

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

Sunshine & UV index in Monmouth

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
8 hours of daylight per day in January in Monmouth8
10 hours of daylight per day in February in Monmouth10
12 hours of daylight per day in March in Monmouth12
14 hours of daylight per day in April in Monmouth14
16 hours of daylight per day in May in Monmouth16
17 hours of daylight per day in June in Monmouth17
16 hours of daylight per day in July in Monmouth16
15 hours of daylight per day in August in Monmouth15
13 hours of daylight per day in September in Monmouth13
11 hours of daylight per day in October in Monmouth11
9 hours of daylight per day in November in Monmouth9
8 hours of daylight per day in December in Monmouth8
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Monmouth1
UV (maximum) index 1 (Low) in February in Monmouth1
UV (maximum) index 2 (Low) in March in Monmouth2
UV (maximum) index 4 (Moderate) in April in Monmouth4
UV (maximum) index 5 (Moderate) in May in Monmouth5
UV (maximum) index 6 (High) in June in Monmouth6
UV (maximum) index 6 (High) in July in Monmouth6
UV (maximum) index 5 (Moderate) in August in Monmouth5
UV (maximum) index 4 (Moderate) in September in Monmouth4
UV (maximum) index 2 (Low) in October in Monmouth2
UV (maximum) index 1 (Low) in November in Monmouth1
No UV (maximum) index in December in Monmouth0

Rainfall in Monmouth

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
18 days with some rainfall in January in Monmouth18
14 days with some rainfall in February in Monmouth14
17 days with some rainfall in March in Monmouth17
15 days with some rainfall in April in Monmouth15
15 days with some rainfall in May in Monmouth15
13 days with some rainfall in June in Monmouth13
12 days with some rainfall in July in Monmouth12
14 days with some rainfall in August in Monmouth14
14 days with some rainfall in September in Monmouth14
16 days with some rainfall in October in Monmouth16
17 days with some rainfall in November in Monmouth17
18 days with some rainfall in December in Monmouth18
Average monthly rainfall (inches)
3.8 inches monthly rainfall in January in Monmouth3.8
2.8 inches monthly rainfall in February in Monmouth2.8
2.8 inches monthly rainfall in March in Monmouth2.8
2.3 inches monthly rainfall in April in Monmouth2.3
2.6 inches monthly rainfall in May in Monmouth2.6
2.3 inches monthly rainfall in June in Monmouth2.3
1.9 inches monthly rainfall in July in Monmouth1.9
2.7 inches monthly rainfall in August in Monmouth2.7
3.1 inches monthly rainfall in September in Monmouth3.1
3.2 inches monthly rainfall in October in Monmouth3.2
3.3 inches monthly rainfall in November in Monmouth3.3
3.9 inches monthly rainfall in December in Monmouth3.9

More about Monmouth

Monmouth by month

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

Recommended for Wales

  • Book hotels in the UK for £35 or less (London from £49)
  • Prices based on lowest saver room rates. T&Cs apply
  • Travel before 20th March 2026 (inclusive)

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The climate guide for Wales (Monmouth) 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 Monmouth?

Monmouth has a temperate climate with warm summers and some rainfall in all months.

Monmouth weather in January

Expect daytime maximum temperatures of 45°F in Monmouth, Wales in January based on long-term weather averages. There are 2 hours of sunshine per day on average with 18 days with some rainfall and typically 3.8 inches of rainfall in the month.

  • 45°F maximum daytime temperature in January in Monmouth45
    45°F max day temperature
  • 2 hours of sunshine per day
  • 18 days with some rainfall in January in Monmouth18
    18 days with some rainfall
  • 34°F minimum night-time temperature in January in Monmouth34
    34°F min night temperature
  • 8 hours of daylight per day in January in Monmouth8
    8 hours of daylight per day
  • No heat & humidity in January in Monmouth0
    No heat & humidity
  • 3.8 inches monthly rainfall in January in Monmouth3.8
    3.8 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in January in Monmouth1
    1 (Low) UV index

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Monmouth weather in February

Expect daytime maximum temperatures of 45°F in Monmouth, Wales in February based on long-term weather averages. There are 2 hours of sunshine per day on average with 14 days with some rainfall and typically 2.8 inches of rainfall in the month.

  • 45°F maximum daytime temperature in February in Monmouth45
    45°F max day temperature
  • 2 hours of sunshine per day
  • 14 days with some rainfall in February in Monmouth14
    14 days with some rainfall
  • 34°F minimum night-time temperature in February in Monmouth34
    34°F min night temperature
  • 10 hours of daylight per day in February in Monmouth10
    10 hours of daylight per day
  • No heat & humidity in February in Monmouth0
    No heat & humidity
  • 2.8 inches monthly rainfall in February in Monmouth2.8
    2.8 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in February in Monmouth1
    1 (Low) UV index

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Monmouth weather in March

Expect daytime maximum temperatures of 48°F in Monmouth, Wales in March based on long-term weather averages. There are 4 hours of sunshine per day on average with 17 days with some rainfall and typically 2.8 inches of rainfall in the month.

  • 48°F maximum daytime temperature in March in Monmouth48
    48°F max day temperature
  • 4 hours of sunshine per day
  • 17 days with some rainfall in March in Monmouth17
    17 days with some rainfall
  • 36°F minimum night-time temperature in March in Monmouth36
    36°F min night temperature
  • 12 hours of daylight per day in March in Monmouth12
    12 hours of daylight per day
  • No heat & humidity in March in Monmouth0
    No heat & humidity
  • 2.8 inches monthly rainfall in March in Monmouth2.8
    2.8 inches of monthly rainfall
  • UV (maximum) index 2 (Low) in March in Monmouth2
    2 (Low) UV index

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Monmouth weather in April

Expect daytime maximum temperatures of 54°F in Monmouth, Wales in April based on long-term weather averages. There are 5 hours of sunshine per day on average with 15 days with some rainfall and typically 2.3 inches of rainfall in the month.

  • 54°F maximum daytime temperature in April in Monmouth54
    54°F max day temperature
  • 5 hours of sunshine per day
  • 15 days with some rainfall in April in Monmouth15
    15 days with some rainfall
  • 39°F minimum night-time temperature in April in Monmouth39
    39°F min night temperature
  • 14 hours of daylight per day in April in Monmouth14
    14 hours of daylight per day
  • No heat & humidity in April in Monmouth0
    No heat & humidity
  • 2.3 inches monthly rainfall in April in Monmouth2.3
    2.3 inches of monthly rainfall
  • UV (maximum) index 4 (Moderate) in April in Monmouth4
    4 (Moderate) UV index

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Monmouth weather in May

Expect daytime maximum temperatures of 61°F in Monmouth, Wales in May based on long-term weather averages. There are 6 hours of sunshine per day on average with 15 days with some rainfall and typically 2.6 inches of rainfall in the month.

  • 61°F maximum daytime temperature in May in Monmouth61
    61°F max day temperature
  • 6 hours of sunshine per day
  • 15 days with some rainfall in May in Monmouth15
    15 days with some rainfall
  • 45°F minimum night-time temperature in May in Monmouth45
    45°F min night temperature
  • 16 hours of daylight per day in May in Monmouth16
    16 hours of daylight per day
  • No heat & humidity in May in Monmouth0
    No heat & humidity
  • 2.6 inches monthly rainfall in May in Monmouth2.6
    2.6 inches of monthly rainfall
  • UV (maximum) index 5 (Moderate) in May in Monmouth5
    5 (Moderate) UV index

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Monmouth weather in June

Expect daytime maximum temperatures of 66°F in Monmouth, Wales in June based on long-term weather averages. There are 7 hours of sunshine per day on average with 13 days with some rainfall and typically 2.3 inches of rainfall in the month.

  • 66°F maximum daytime temperature in June in Monmouth66
    66°F max day temperature
  • 7 hours of sunshine per day
  • 13 days with some rainfall in June in Monmouth13
    13 days with some rainfall
  • 50°F minimum night-time temperature in June in Monmouth50
    50°F min night temperature
  • 17 hours of daylight per day in June in Monmouth17
    17 hours of daylight per day
  • No heat & humidity in June in Monmouth0
    No heat & humidity
  • 2.3 inches monthly rainfall in June in Monmouth2.3
    2.3 inches of monthly rainfall
  • UV (maximum) index 6 (High) in June in Monmouth6
    6 (High) UV index

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Monmouth weather in July

Expect daytime maximum temperatures of 70°F in Monmouth, Wales in July based on long-term weather averages. There are 6 hours of sunshine per day on average with 12 days with some rainfall and typically 1.9 inches of rainfall in the month.

  • 70°F maximum daytime temperature in July in Monmouth70
    70°F max day temperature
  • 6 hours of sunshine per day
  • 12 days with some rainfall in July in Monmouth12
    12 days with some rainfall
  • 52°F minimum night-time temperature in July in Monmouth52
    52°F min night temperature
  • 16 hours of daylight per day in July in Monmouth16
    16 hours of daylight per day
  • No heat & humidity in July in Monmouth0
    No heat & humidity
  • 1.9 inches monthly rainfall in July in Monmouth1.9
    1.9 inches of monthly rainfall
  • UV (maximum) index 6 (High) in July in Monmouth6
    6 (High) UV index

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Monmouth weather in August

Expect daytime maximum temperatures of 68°F in Monmouth, Wales in August based on long-term weather averages. There are 6 hours of sunshine per day on average with 14 days with some rainfall and typically 2.7 inches of rainfall in the month.

  • 68°F maximum daytime temperature in August in Monmouth68
    68°F max day temperature
  • 6 hours of sunshine per day
  • 14 days with some rainfall in August in Monmouth14
    14 days with some rainfall
  • 52°F minimum night-time temperature in August in Monmouth52
    52°F min night temperature
  • 15 hours of daylight per day in August in Monmouth15
    15 hours of daylight per day
  • No heat & humidity in August in Monmouth0
    No heat & humidity
  • 2.7 inches monthly rainfall in August in Monmouth2.7
    2.7 inches of monthly rainfall
  • UV (maximum) index 5 (Moderate) in August in Monmouth5
    5 (Moderate) UV index

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Monmouth weather in September

Expect daytime maximum temperatures of 64°F in Monmouth, Wales in September based on long-term weather averages. There are 4 hours of sunshine per day on average with 14 days with some rainfall and typically 3.1 inches of rainfall in the month.

  • 64°F maximum daytime temperature in September in Monmouth64
    64°F max day temperature
  • 4 hours of sunshine per day
  • 14 days with some rainfall in September in Monmouth14
    14 days with some rainfall
  • 48°F minimum night-time temperature in September in Monmouth48
    48°F min night temperature
  • 13 hours of daylight per day in September in Monmouth13
    13 hours of daylight per day
  • No heat & humidity in September in Monmouth0
    No heat & humidity
  • 3.1 inches monthly rainfall in September in Monmouth3.1
    3.1 inches of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Monmouth4
    4 (Moderate) UV index

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Monmouth weather in October

Expect daytime maximum temperatures of 57°F in Monmouth, Wales in October based on long-term weather averages. There are 3 hours of sunshine per day on average with 16 days with some rainfall and typically 3.2 inches of rainfall in the month.

  • 57°F maximum daytime temperature in October in Monmouth57
    57°F max day temperature
  • 3 hours of sunshine per day
  • 16 days with some rainfall in October in Monmouth16
    16 days with some rainfall
  • 45°F minimum night-time temperature in October in Monmouth45
    45°F min night temperature
  • 11 hours of daylight per day in October in Monmouth11
    11 hours of daylight per day
  • No heat & humidity in October in Monmouth0
    No heat & humidity
  • 3.2 inches monthly rainfall in October in Monmouth3.2
    3.2 inches of monthly rainfall
  • UV (maximum) index 2 (Low) in October in Monmouth2
    2 (Low) UV index

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Monmouth weather in November

Expect daytime maximum temperatures of 50°F in Monmouth, Wales in November based on long-term weather averages. There are 2 hours of sunshine per day on average with 17 days with some rainfall and typically 3.3 inches of rainfall in the month.

  • 50°F maximum daytime temperature in November in Monmouth50
    50°F max day temperature
  • 2 hours of sunshine per day
  • 17 days with some rainfall in November in Monmouth17
    17 days with some rainfall
  • 39°F minimum night-time temperature in November in Monmouth39
    39°F min night temperature
  • 9 hours of daylight per day in November in Monmouth9
    9 hours of daylight per day
  • No heat & humidity in November in Monmouth0
    No heat & humidity
  • 3.3 inches monthly rainfall in November in Monmouth3.3
    3.3 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in November in Monmouth1
    1 (Low) UV index

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Monmouth weather in December

Expect daytime maximum temperatures of 45°F in Monmouth, Wales in December based on long-term weather averages. There are 2 hours of sunshine per day on average with 18 days with some rainfall and typically 3.9 inches of rainfall in the month.

  • 45°F maximum daytime temperature in December in Monmouth45
    45°F max day temperature
  • 2 hours of sunshine per day
  • 18 days with some rainfall in December in Monmouth18
    18 days with some rainfall
  • 36°F minimum night-time temperature in December in Monmouth36
    36°F min night temperature
  • 8 hours of daylight per day in December in Monmouth8
    8 hours of daylight per day
  • No heat & humidity in December in Monmouth0
    No heat & humidity
  • 3.9 inches monthly rainfall in December in Monmouth3.9
    3.9 inches of monthly rainfall
  • No UV (maximum) index in December in Monmouth0
    No UV (Maximum) Index UV index

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More about Monmouth

Monmouth by month

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

Recommended for Wales

  • Book hotels in the UK for £35 or less (London from £49)
  • Prices based on lowest saver room rates. T&Cs apply
  • Travel before 20th March 2026 (inclusive)

Expires at 23:59 on Friday 20th Mar 2026 · View all Travelodge offers

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The climate guide for Wales (Monmouth) 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)  |  Imperial (°F)

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Compare Monmouth weather with the UK

The weather chart below compares the average monthly maximum daytime temperature for Monmouth, Monmouthshire, Wales and the UK (London).

Maximum daytime temperature (°F)

Monmouth, Monmouthshire, Wales
UK (London)
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C)  |  Imperial (°F)

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