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 (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
7°C maximum daytime temperature in January in Monmouth7
7°C maximum daytime temperature in February in Monmouth7
9°C maximum daytime temperature in March in Monmouth9
12°C maximum daytime temperature in April in Monmouth12
16°C maximum daytime temperature in May in Monmouth16
19°C maximum daytime temperature in June in Monmouth19
21°C maximum daytime temperature in July in Monmouth21
20°C maximum daytime temperature in August in Monmouth20
18°C maximum daytime temperature in September in Monmouth18
14°C maximum daytime temperature in October in Monmouth14
10°C maximum daytime temperature in November in Monmouth10
7°C maximum daytime temperature in December in Monmouth7
Min temperature (night-time)
1°C minimum night-time temperature in January in Monmouth1
1°C minimum night-time temperature in February in Monmouth1
2°C minimum night-time temperature in March in Monmouth2
4°C minimum night-time temperature in April in Monmouth4
7°C minimum night-time temperature in May in Monmouth7
10°C minimum night-time temperature in June in Monmouth10
11°C minimum night-time temperature in July in Monmouth11
11°C minimum night-time temperature in August in Monmouth11
9°C minimum night-time temperature in September in Monmouth9
7°C minimum night-time temperature in October in Monmouth7
4°C minimum night-time temperature in November in Monmouth4
2°C minimum night-time temperature in December in Monmouth2
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 (mm)
96 mm monthly rainfall in January in Monmouth96
71 mm monthly rainfall in February in Monmouth71
72 mm monthly rainfall in March in Monmouth72
58 mm monthly rainfall in April in Monmouth58
65 mm monthly rainfall in May in Monmouth65
58 mm monthly rainfall in June in Monmouth58
48 mm monthly rainfall in July in Monmouth48
68 mm monthly rainfall in August in Monmouth68
78 mm monthly rainfall in September in Monmouth78
82 mm monthly rainfall in October in Monmouth82
85 mm monthly rainfall in November in Monmouth85
98 mm monthly rainfall in December in Monmouth98

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 7°C 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 96 mm of rainfall in the month.

  • 7°C maximum daytime temperature in January in Monmouth7
    7°C max day temperature
  • 2 hours of sunshine per day
  • 18 days with some rainfall in January in Monmouth18
    18 days with some rainfall
  • 1°C minimum night-time temperature in January in Monmouth1
    1°C 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
  • 96 mm monthly rainfall in January in Monmouth96
    96 mm 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 7°C 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 71 mm of rainfall in the month.

  • 7°C maximum daytime temperature in February in Monmouth7
    7°C max day temperature
  • 2 hours of sunshine per day
  • 14 days with some rainfall in February in Monmouth14
    14 days with some rainfall
  • 1°C minimum night-time temperature in February in Monmouth1
    1°C 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
  • 71 mm monthly rainfall in February in Monmouth71
    71 mm 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 9°C 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 72 mm of rainfall in the month.

  • 9°C maximum daytime temperature in March in Monmouth9
    9°C max day temperature
  • 4 hours of sunshine per day
  • 17 days with some rainfall in March in Monmouth17
    17 days with some rainfall
  • 2°C minimum night-time temperature in March in Monmouth2
    2°C 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
  • 72 mm monthly rainfall in March in Monmouth72
    72 mm 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 12°C 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 58 mm of rainfall in the month.

  • 12°C maximum daytime temperature in April in Monmouth12
    12°C max day temperature
  • 5 hours of sunshine per day
  • 15 days with some rainfall in April in Monmouth15
    15 days with some rainfall
  • 4°C minimum night-time temperature in April in Monmouth4
    4°C 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
  • 58 mm monthly rainfall in April in Monmouth58
    58 mm 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 16°C 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 65 mm of rainfall in the month.

  • 16°C maximum daytime temperature in May in Monmouth16
    16°C max day temperature
  • 6 hours of sunshine per day
  • 15 days with some rainfall in May in Monmouth15
    15 days with some rainfall
  • 7°C minimum night-time temperature in May in Monmouth7
    7°C 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
  • 65 mm monthly rainfall in May in Monmouth65
    65 mm 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 19°C 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 58 mm of rainfall in the month.

  • 19°C maximum daytime temperature in June in Monmouth19
    19°C max day temperature
  • 7 hours of sunshine per day
  • 13 days with some rainfall in June in Monmouth13
    13 days with some rainfall
  • 10°C minimum night-time temperature in June in Monmouth10
    10°C 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
  • 58 mm monthly rainfall in June in Monmouth58
    58 mm 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 21°C 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 48 mm of rainfall in the month.

  • 21°C maximum daytime temperature in July in Monmouth21
    21°C max day temperature
  • 6 hours of sunshine per day
  • 12 days with some rainfall in July in Monmouth12
    12 days with some rainfall
  • 11°C minimum night-time temperature in July in Monmouth11
    11°C 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
  • 48 mm monthly rainfall in July in Monmouth48
    48 mm 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 20°C 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 68 mm of rainfall in the month.

  • 20°C maximum daytime temperature in August in Monmouth20
    20°C max day temperature
  • 6 hours of sunshine per day
  • 14 days with some rainfall in August in Monmouth14
    14 days with some rainfall
  • 11°C minimum night-time temperature in August in Monmouth11
    11°C 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
  • 68 mm monthly rainfall in August in Monmouth68
    68 mm 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 18°C 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 78 mm of rainfall in the month.

  • 18°C maximum daytime temperature in September in Monmouth18
    18°C max day temperature
  • 4 hours of sunshine per day
  • 14 days with some rainfall in September in Monmouth14
    14 days with some rainfall
  • 9°C minimum night-time temperature in September in Monmouth9
    9°C 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
  • 78 mm monthly rainfall in September in Monmouth78
    78 mm 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 14°C 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 82 mm of rainfall in the month.

  • 14°C maximum daytime temperature in October in Monmouth14
    14°C max day temperature
  • 3 hours of sunshine per day
  • 16 days with some rainfall in October in Monmouth16
    16 days with some rainfall
  • 7°C minimum night-time temperature in October in Monmouth7
    7°C 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
  • 82 mm monthly rainfall in October in Monmouth82
    82 mm 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 10°C 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 85 mm of rainfall in the month.

  • 10°C maximum daytime temperature in November in Monmouth10
    10°C max day temperature
  • 2 hours of sunshine per day
  • 17 days with some rainfall in November in Monmouth17
    17 days with some rainfall
  • 4°C minimum night-time temperature in November in Monmouth4
    4°C 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
  • 85 mm monthly rainfall in November in Monmouth85
    85 mm 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 7°C 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 98 mm of rainfall in the month.

  • 7°C maximum daytime temperature in December in Monmouth7
    7°C max day temperature
  • 2 hours of sunshine per day
  • 18 days with some rainfall in December in Monmouth18
    18 days with some rainfall
  • 2°C minimum night-time temperature in December in Monmouth2
    2°C 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
  • 98 mm monthly rainfall in December in Monmouth98
    98 mm 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

TravelodgeHotel deal finder

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 / mm)  |  Imperial (°F / inches)

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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 (°C)

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

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

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