Monmouth weather

The Monmouth weather guide shows monthly weather averages (including daytime and night-time temperatures, rainfall and hours of sunshine) for holidays in Monmouth, Monmouthshire, Wales in 2026/2027.

• Monmouth weather averages
• Monmouth weather by month
• Back to Monmouthshire
• Back to Wales

Monmouth weather averages

Check the Monmouth weather averages for each month of the year including maximum daytime and minimum night-time temperatures, monthly rainfall, number of days with rain and average daily hours of sunshine for Monmouth, Monmouthshire, Wales.

Back to top

Monmouth weather by month

Check the weather for Monmouth, Monmouthshire, Wales for a particular month by selecting from the list below. This gives the best indication of what to expect from the weather months in advance.

• January
• February
• March
• April
• May
• June
• July
• August
• September
• October
• November
• December

Back to top

Monmouth weather in January

The average maximum daytime temperature in Monmouth in January is a cold 7°C (45°F), while the average minimum night-time temperature is a cold 1°C (34°F). You can expect on average 2 hours of sunshine a day in Monmouth during January.

• 7
  7°C max day temperature
• 2
  2 hours of sunshine per day
• 19
  19 days with some rainfall
• 1
  1°C min night temperature
• 108
  108 mm of monthly rainfall

On average 108 mm (4.3 inches) of rain normally falls in Monmouth during January with rain falling on 19 days of the month.

Back to months

Monmouth weather in February

The average maximum daytime temperature in Monmouth in February is a cold 7°C (45°F), while the average minimum night-time temperature is a cold 1°C (34°F). You can expect on average 2 hours of sunshine a day in Monmouth during February.

• 7
  7°C max day temperature
• 2
  2 hours of sunshine per day
• 15
  15 days with some rainfall
• 1
  1°C min night temperature
• 85
  85 mm of monthly rainfall

On average 85 mm (3.3 inches) of rain normally falls in Monmouth during February with rain falling on 15 days of the month.

Back to months

Monmouth weather in March

The average maximum daytime temperature in Monmouth in March is a cool 10°C (50°F), while the average minimum night-time temperature is a cold 3°C (37°F). You can expect on average 4 hours of sunshine a day in Monmouth during March.

• 10
  10°C max day temperature
• 4
  4 hours of sunshine per day
• 17
  17 days with some rainfall
• 3
  3°C min night temperature
• 79
  79 mm of monthly rainfall

On average 79 mm (3.1 inches) of rain normally falls in Monmouth during March with rain falling on 17 days of the month.

Back to months

Monmouth weather in April

The average maximum daytime temperature in Monmouth in April is a cool 12°C (54°F), while the average minimum night-time temperature is a cold 4°C (39°F). You can expect on average 5 hours of sunshine a day in Monmouth during April.

• 12
  12°C max day temperature
• 5
  5 hours of sunshine per day
• 15
  15 days with some rainfall
• 4
  4°C min night temperature
• 63
  63 mm of monthly rainfall

On average 63 mm (2.5 inches) of rain normally falls in Monmouth during April with rain falling on 15 days of the month.

Back to months

Monmouth weather in May

The average maximum daytime temperature in Monmouth in May is a comfortable 16°C (61°F), while the average minimum night-time temperature is a cold 7°C (45°F). You can expect on average 6 hours of sunshine a day in Monmouth during May.

• 16
  16°C max day temperature
• 6
  6 hours of sunshine per day
• 14
  14 days with some rainfall
• 7
  7°C min night temperature
• 63
  63 mm of monthly rainfall

On average 63 mm (2.5 inches) of rain normally falls in Monmouth during May with rain falling on 14 days of the month.

Back to months

Monmouth weather in June

The average maximum daytime temperature in Monmouth in June is a comfortable 19°C (66°F), while the average minimum night-time temperature is a cool 9°C (48°F). You can expect on average 7 hours of sunshine a day in Monmouth during June.

• 19
  19°C max day temperature
• 7
  7 hours of sunshine per day
• 13
  13 days with some rainfall
• 9
  9°C min night temperature
• 63
  63 mm of monthly rainfall

On average 63 mm (2.5 inches) of rain normally falls in Monmouth during June with rain falling on 13 days of the month.

Back to months

Monmouth weather in July

The average maximum daytime temperature in Monmouth in July is a comfortable 21°C (70°F), while the average minimum night-time temperature is a cool 12°C (54°F). You can expect on average 6 hours of sunshine a day in Monmouth during July.

• 21
  21°C max day temperature
• 6
  6 hours of sunshine per day
• 13
  13 days with some rainfall
• 12
  12°C min night temperature
• 54
  54 mm of monthly rainfall

On average 54 mm (2.1 inches) of rain normally falls in Monmouth during July with rain falling on 13 days of the month.

Back to months

Monmouth weather in August

The average maximum daytime temperature in Monmouth in August is a comfortable 21°C (70°F), while the average minimum night-time temperature is a cool 12°C (54°F). You can expect on average 6 hours of sunshine a day in Monmouth during August.

• 21
  21°C max day temperature
• 6
  6 hours of sunshine per day
• 14
  14 days with some rainfall
• 12
  12°C min night temperature
• 72
  72 mm of monthly rainfall

On average 72 mm (2.8 inches) of rain normally falls in Monmouth during August with rain falling on 14 days of the month.

Back to months

Monmouth weather in September

The average maximum daytime temperature in Monmouth in September is a comfortable 18°C (64°F), while the average minimum night-time temperature is a cool 9°C (48°F). You can expect on average 4 hours of sunshine a day in Monmouth during September.

• 18
  18°C max day temperature
• 4
  4 hours of sunshine per day
• 14
  14 days with some rainfall
• 9
  9°C min night temperature
• 81
  81 mm of monthly rainfall

On average 81 mm (3.2 inches) of rain normally falls in Monmouth during September with rain falling on 14 days of the month.

Back to months

Monmouth weather in October

The average maximum daytime temperature in Monmouth in October is a comfortable 14°C (57°F), while the average minimum night-time temperature is a cold 7°C (45°F). You can expect on average 3 hours of sunshine a day in Monmouth during October.

• 14
  14°C max day temperature
• 3
  3 hours of sunshine per day
• 17
  17 days with some rainfall
• 7
  7°C min night temperature
• 92
  92 mm of monthly rainfall

On average 92 mm (3.6 inches) of rain normally falls in Monmouth during October with rain falling on 17 days of the month.

Back to months

Monmouth weather in November

The average maximum daytime temperature in Monmouth in November is a cool 10°C (50°F), while the average minimum night-time temperature is a cold 4°C (39°F). You can expect on average 2 hours of sunshine a day in Monmouth during November.

• 10
  10°C max day temperature
• 2
  2 hours of sunshine per day
• 18
  18 days with some rainfall
• 4
  4°C min night temperature
• 91
  91 mm of monthly rainfall

On average 91 mm (3.6 inches) of rain normally falls in Monmouth during November with rain falling on 18 days of the month.

Back to months

Monmouth weather in December

The average maximum daytime temperature in Monmouth in December is a cold 7°C (45°F), while the average minimum night-time temperature is a cold 2°C (36°F). You can expect on average 2 hours of sunshine a day in Monmouth during December.

• 7
  7°C max day temperature
• 2
  2 hours of sunshine per day
• 18
  18 days with some rainfall
• 2
  2°C min night temperature
• 106
  106 mm of monthly rainfall

On average 106 mm (4.2 inches) of rain normally falls in Monmouth during December with rain falling on 18 days of the month.

Back to months