Barmouth weather
The Barmouth weather guide shows monthly weather averages (including daytime and night-time temperatures, rainfall and hours of sunshine) for holidays in Barmouth, Gwynedd, Wales in 2026/2027.
Barmouth weather averages
Check the Barmouth 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 Barmouth, Gwynedd, Wales.
Barmouth weather by month
Check the weather for Barmouth, Gwynedd, 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.
Barmouth weather in January
The average maximum daytime temperature in Barmouth in January 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 1 hours of sunshine a day in Barmouth during January.
- 7°C max day temperature
7 - 1 hour of sunshine per day
1 - 21 days with some rainfall
21 - 2°C min night temperature
2 - 210 mm of monthly rainfall
210
On average 210 mm (8.3 inches) of rain normally falls in Barmouth during January with rain falling on 21 days of the month.
Barmouth weather in February
The average maximum daytime temperature in Barmouth in February 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 Barmouth during February.
- 7°C max day temperature7
- 2 hours of sunshine per day
2 - 17 days with some rainfall
17 - 2°C min night temperature2
- 153 mm of monthly rainfall
153
On average 153 mm (6 inches) of rain normally falls in Barmouth during February with rain falling on 17 days of the month.
Barmouth weather in March
The average maximum daytime temperature in Barmouth in March is a cool 9°C (48°F), while the average minimum night-time temperature is a cold 3°C (37°F). You can expect on average 3 hours of sunshine a day in Barmouth during March.
- 9°C max day temperature
9 - 3 hours of sunshine per day
3 - 18 days with some rainfall18
- 3°C min night temperature3
- 160 mm of monthly rainfall160
On average 160 mm (6.3 inches) of rain normally falls in Barmouth during March with rain falling on 18 days of the month.
Barmouth weather in April
The average maximum daytime temperature in Barmouth in April is a cool 11°C (52°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 Barmouth during April.
- 11°C max day temperature11
- 5 hours of sunshine per day
5 - 16 days with some rainfall16
- 4°C min night temperature4
- 105 mm of monthly rainfall
105
On average 105 mm (4.1 inches) of rain normally falls in Barmouth during April with rain falling on 16 days of the month.
Barmouth weather in May
The average maximum daytime temperature in Barmouth in May is a comfortable 15°C (59°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 Barmouth during May.
- 15°C max day temperature
15 - 6 hours of sunshine per day
6 - 15 days with some rainfall
15 - 7°C min night temperature7
- 98 mm of monthly rainfall
98
On average 98 mm (3.9 inches) of rain normally falls in Barmouth during May with rain falling on 15 days of the month.
Barmouth weather in June
The average maximum daytime temperature in Barmouth in June is a comfortable 17°C (63°F), while the average minimum night-time temperature is a cool 9°C (48°F). You can expect on average 6 hours of sunshine a day in Barmouth during June.
- 17°C max day temperature17
- 6 hours of sunshine per day6
- 14 days with some rainfall14
- 9°C min night temperature9
- 107 mm of monthly rainfall107
On average 107 mm (4.2 inches) of rain normally falls in Barmouth during June with rain falling on 14 days of the month.
Barmouth weather in July
The average maximum daytime temperature in Barmouth in July is a comfortable 19°C (66°F), while the average minimum night-time temperature is a cool 11°C (52°F). You can expect on average 5 hours of sunshine a day in Barmouth during July.
- 19°C max day temperature
19 - 5 hours of sunshine per day5
- 13 days with some rainfall13
- 11°C min night temperature11
- 98 mm of monthly rainfall98
On average 98 mm (3.9 inches) of rain normally falls in Barmouth during July with rain falling on 13 days of the month.
Barmouth weather in August
The average maximum daytime temperature in Barmouth in August is a comfortable 19°C (66°F), while the average minimum night-time temperature is a cool 11°C (52°F). You can expect on average 5 hours of sunshine a day in Barmouth during August.
- 19°C max day temperature19
- 5 hours of sunshine per day5
- 16 days with some rainfall16
- 11°C min night temperature11
- 129 mm of monthly rainfall
129
On average 129 mm (5.1 inches) of rain normally falls in Barmouth during August with rain falling on 16 days of the month.
Barmouth weather in September
The average maximum daytime temperature in Barmouth in September is a comfortable 17°C (63°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 Barmouth during September.
- 17°C max day temperature17
- 4 hours of sunshine per day
4 - 16 days with some rainfall16
- 9°C min night temperature9
- 164 mm of monthly rainfall
164
On average 164 mm (6.5 inches) of rain normally falls in Barmouth during September with rain falling on 16 days of the month.
Barmouth weather in October
The average maximum daytime temperature in Barmouth in October is a cool 13°C (55°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 Barmouth during October.
- 13°C max day temperature
13 - 3 hours of sunshine per day3
- 18 days with some rainfall18
- 7°C min night temperature7
- 196 mm of monthly rainfall
196
On average 196 mm (7.7 inches) of rain normally falls in Barmouth during October with rain falling on 18 days of the month.
Barmouth weather in November
The average maximum daytime temperature in Barmouth 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 Barmouth during November.
- 10°C max day temperature10
- 2 hours of sunshine per day2
- 20 days with some rainfall20
- 4°C min night temperature4
- 206 mm of monthly rainfall206
On average 206 mm (8.1 inches) of rain normally falls in Barmouth during November with rain falling on 20 days of the month.
Barmouth weather in December
The average maximum daytime temperature in Barmouth in December is a cool 8°C (46°F), while the average minimum night-time temperature is a cold 3°C (37°F). You can expect on average 1 hours of sunshine a day in Barmouth during December.
- 8°C max day temperature8
- 1 hour of sunshine per day1
- 21 days with some rainfall21
- 3°C min night temperature3
- 225 mm of monthly rainfall
225
On average 225 mm (8.9 inches) of rain normally falls in Barmouth during December with rain falling on 21 days of the month.