Deiniolen weather
The Deiniolen weather guide shows monthly weather averages (including daytime and night-time temperatures, rainfall and hours of sunshine) for holidays in Deiniolen, Gwynedd, Wales in 2026/2027.
Deiniolen weather averages
Check the Deiniolen 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 Deiniolen, Gwynedd, Wales.
Deiniolen weather by month
Check the weather for Deiniolen, 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.
Deiniolen weather in January
The average maximum daytime temperature in Deiniolen in January is a cold 7°C (45°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 Deiniolen during January.
- 7°C max day temperature
7 - 1 hour of sunshine per day
1 - 20 days with some rainfall
20 - 3°C min night temperature
3 - 128 mm of monthly rainfall
128
On average 128 mm (5 inches) of rain normally falls in Deiniolen during January with rain falling on 20 days of the month.
Deiniolen weather in February
The average maximum daytime temperature in Deiniolen in February 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 2 hours of sunshine a day in Deiniolen during February.
- 8°C max day temperature
8 - 2 hours of sunshine per day
2 - 17 days with some rainfall
17 - 3°C min night temperature3
- 92 mm of monthly rainfall
92
On average 92 mm (3.6 inches) of rain normally falls in Deiniolen during February with rain falling on 17 days of the month.
Deiniolen weather in March
The average maximum daytime temperature in Deiniolen in March is a cool 9°C (48°F), while the average minimum night-time temperature is a cold 4°C (39°F). You can expect on average 3 hours of sunshine a day in Deiniolen during March.
- 9°C max day temperature9
- 3 hours of sunshine per day
3 - 18 days with some rainfall18
- 4°C min night temperature4
- 105 mm of monthly rainfall
105
On average 105 mm (4.1 inches) of rain normally falls in Deiniolen during March with rain falling on 18 days of the month.
Deiniolen weather in April
The average maximum daytime temperature in Deiniolen in April is a cool 11°C (52°F), while the average minimum night-time temperature is a cold 5°C (41°F). You can expect on average 5 hours of sunshine a day in Deiniolen during April.
- 11°C max day temperature11
- 5 hours of sunshine per day
5 - 15 days with some rainfall
15 - 5°C min night temperature5
- 74 mm of monthly rainfall
74
On average 74 mm (2.9 inches) of rain normally falls in Deiniolen during April with rain falling on 15 days of the month.
Deiniolen weather in May
The average maximum daytime temperature in Deiniolen 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 Deiniolen during May.
- 15°C max day temperature
15 - 6 hours of sunshine per day
6 - 15 days with some rainfall15
- 7°C min night temperature7
- 68 mm of monthly rainfall68
On average 68 mm (2.7 inches) of rain normally falls in Deiniolen during May with rain falling on 15 days of the month.
Deiniolen weather in June
The average maximum daytime temperature in Deiniolen in June is a comfortable 17°C (63°F), while the average minimum night-time temperature is a cool 10°C (50°F). You can expect on average 6 hours of sunshine a day in Deiniolen during June.
- 17°C max day temperature17
- 6 hours of sunshine per day6
- 14 days with some rainfall14
- 10°C min night temperature10
- 77 mm of monthly rainfall77
On average 77 mm (3 inches) of rain normally falls in Deiniolen during June with rain falling on 14 days of the month.
Deiniolen weather in July
The average maximum daytime temperature in Deiniolen in July is a comfortable 19°C (66°F), while the average minimum night-time temperature is a cool 12°C (54°F). You can expect on average 5 hours of sunshine a day in Deiniolen during July.
- 19°C max day temperature
19 - 5 hours of sunshine per day5
- 14 days with some rainfall14
- 12°C min night temperature
12 - 77 mm of monthly rainfall77
On average 77 mm (3 inches) of rain normally falls in Deiniolen during July with rain falling on 14 days of the month.
Deiniolen weather in August
The average maximum daytime temperature in Deiniolen in August is a comfortable 19°C (66°F), while the average minimum night-time temperature is a cool 12°C (54°F). You can expect on average 5 hours of sunshine a day in Deiniolen during August.
- 19°C max day temperature19
- 5 hours of sunshine per day5
- 16 days with some rainfall16
- 12°C min night temperature12
- 94 mm of monthly rainfall94
On average 94 mm (3.7 inches) of rain normally falls in Deiniolen during August with rain falling on 16 days of the month.
Deiniolen weather in September
The average maximum daytime temperature in Deiniolen in September is a comfortable 17°C (63°F), while the average minimum night-time temperature is a cool 10°C (50°F). You can expect on average 4 hours of sunshine a day in Deiniolen during September.
- 17°C max day temperature17
- 4 hours of sunshine per day
4 - 16 days with some rainfall16
- 10°C min night temperature10
- 112 mm of monthly rainfall112
On average 112 mm (4.4 inches) of rain normally falls in Deiniolen during September with rain falling on 16 days of the month.
Deiniolen weather in October
The average maximum daytime temperature in Deiniolen in October is a comfortable 14°C (57°F), while the average minimum night-time temperature is a cool 8°C (46°F). You can expect on average 3 hours of sunshine a day in Deiniolen during October.
- 14°C max day temperature14
- 3 hours of sunshine per day3
- 19 days with some rainfall19
- 8°C min night temperature8
- 136 mm of monthly rainfall136
On average 136 mm (5.4 inches) of rain normally falls in Deiniolen during October with rain falling on 19 days of the month.
Deiniolen weather in November
The average maximum daytime temperature in Deiniolen in November is a cool 10°C (50°F), while the average minimum night-time temperature is a cold 5°C (41°F). You can expect on average 2 hours of sunshine a day in Deiniolen during November.
- 10°C max day temperature10
- 2 hours of sunshine per day2
- 21 days with some rainfall21
- 5°C min night temperature5
- 151 mm of monthly rainfall
151
On average 151 mm (5.9 inches) of rain normally falls in Deiniolen during November with rain falling on 21 days of the month.
Deiniolen weather in December
The average maximum daytime temperature in Deiniolen in December is a cool 8°C (46°F), while the average minimum night-time temperature is a cold 4°C (39°F). You can expect on average 1 hours of sunshine a day in Deiniolen during December.
- 8°C max day temperature8
- 1 hour of sunshine per day1
- 21 days with some rainfall21
- 4°C min night temperature4
- 145 mm of monthly rainfall145
On average 145 mm (5.7 inches) of rain normally falls in Deiniolen during December with rain falling on 21 days of the month.