Llanberis weather
The Llanberis weather guide shows monthly weather averages (including daytime and night-time temperatures, rainfall and hours of sunshine) for holidays in Llanberis, Gwynedd, Wales in 2026/2027.
Llanberis weather averages
Check the Llanberis 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 Llanberis, Gwynedd, Wales.
Llanberis weather by month
Check the weather for Llanberis, 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.
Llanberis weather in January
The average maximum daytime temperature in Llanberis 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 Llanberis 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 Llanberis during January with rain falling on 20 days of the month.
Llanberis weather in February
The average maximum daytime temperature in Llanberis 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 Llanberis 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 Llanberis during February with rain falling on 17 days of the month.
Llanberis weather in March
The average maximum daytime temperature in Llanberis 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 Llanberis 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 Llanberis during March with rain falling on 18 days of the month.
Llanberis weather in April
The average maximum daytime temperature in Llanberis 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 Llanberis 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 Llanberis during April with rain falling on 15 days of the month.
Llanberis weather in May
The average maximum daytime temperature in Llanberis 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 Llanberis 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 Llanberis during May with rain falling on 15 days of the month.
Llanberis weather in June
The average maximum daytime temperature in Llanberis 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 Llanberis 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 Llanberis during June with rain falling on 14 days of the month.
Llanberis weather in July
The average maximum daytime temperature in Llanberis 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 Llanberis 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 Llanberis during July with rain falling on 14 days of the month.
Llanberis weather in August
The average maximum daytime temperature in Llanberis 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 Llanberis 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 Llanberis during August with rain falling on 16 days of the month.
Llanberis weather in September
The average maximum daytime temperature in Llanberis 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 Llanberis 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 Llanberis during September with rain falling on 16 days of the month.
Llanberis weather in October
The average maximum daytime temperature in Llanberis 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 Llanberis 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 Llanberis during October with rain falling on 19 days of the month.
Llanberis weather in November
The average maximum daytime temperature in Llanberis 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 Llanberis 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 Llanberis during November with rain falling on 21 days of the month.
Llanberis weather in December
The average maximum daytime temperature in Llanberis 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 Llanberis 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 Llanberis during December with rain falling on 21 days of the month.