Groeslon Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Groeslon.
Climate overview of Groeslon
The climate in Groeslon, Gwynedd, United Kingdom, sees a moderate range of temperatures across the year, from 19°C (66°F) in August down to 9°C (48°F) in January.
The city receives considerable rainfall, with around 1471 mm (58 in) annually. December is the wettest month. The most sunshine falls in May, with an average of 5.6 hours of daily sunshine.
Groeslon Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Groeslon - and find the best time to visit.
Monthly Temperature in Groeslon
The climate in Groeslon experiences moderate temperature changes, with mild shifts between seasons. Typically, average maximum daytime temperatures range from a pleasant 19°C (66°F) in August to a chilly 9°C (48°F) in the coolest month, January.
Nights vary from 13°C (55°F) in August to around 4°C (39°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Groeslon
Groeslon experiences significant rainfall throughout the year, averaging 1471 mm (58 in) of precipitation annually. Groeslon offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between the wettest month December (163 mm (6.4 in)) and the driest month May (91 mm (3.6 in)) is not too significant. For more details, please visit our Groeslon Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Groeslon
For those who appreciate different seasons, Groeslon serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 5.6 hours of sunshine daily, and embrace the darker days in December, offering only 0.9 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit Groeslon
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, June, July and August
- Warmest weather: July, August and September
- Most sunshine: May
Frequently asked questions about the climate in Groeslon
What is the best time to visit Groeslon?
May, June, July and August typically offer the most optimal weather in Groeslon. In contrast, January, February, March, November and December tend to have less optimal conditions.
What temperatures can I expect in Groeslon?
Daytime highs range from 9°C (48°F) in January to 19°C (66°F) in August. Nighttime lows range from 4°C (39°F) to 13°C (55°F).
How much rain does Groeslon get?
Annual rainfall is around 1471 mm (58 in). December is the wettest month with 163 mm (6.4 in), while May is the driest with 91 mm (3.6 in).
How sunny is Groeslon?
Groeslon receives around 1,192 hours of sunshine per year. May is the sunniest month with 169 hours, while December is the cloudiest with just 26 hours.
Groeslon 3-Day Forecast
Groeslon 3-Day Forecast
Groeslon on the map
Groeslon is highlighted - select any city to see its climate.
Popular this month
Where to go in July - average daytime high across popular destinations.
London
23°C (73°F) Bath22°C (72°F) York22°C (72°F) Manchester
21°C (70°F) Edinburgh
19°C (66°F) Glasgow19°C (66°F) Torquay20°C (68°F) Blackpool19°C (66°F) 
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