Dyffryn Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Dyffryn.
Climate overview of Dyffryn
The climate in Dyffryn, Gwynedd, United Kingdom, sees a moderate range of temperatures across the year, from 19°C (66°F) in July down to 9°C (48°F) in January.
With around 1477 mm (58 in) of annual rainfall, Dyffryn has a notably wet climate. However, this rainfall is not evenly distributed — the city has pleasant summers and cold winters. The wettest month is December. May is the sunniest month, averaging 5.6 hours of sunshine per day.
Dyffryn Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Dyffryn - and find the best time to visit.
Monthly Temperature in Dyffryn
In Dyffryn, seasonal changes bring about a moderate variation in temperatures. Average daytime temperatures reach a pleasant 19°C (66°F) in July. In January, the coolest month of the year, temperatures drop to a chilly 9°C (48°F).
At night, temperatures range from around 13°C (55°F) in July to 3°C (37°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Dyffryn
Dyffryn experiences significant rainfall throughout the year, averaging 1477 mm (58 in) of precipitation annually. Dyffryn experiences moderate seasonal variation in rainfall, with monthly averages ranging from 169 mm (6.7 in) in December, the wettest month, and 90 mm (3.5 in) in April, the driest month. For more details, please visit our Dyffryn 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 Dyffryn
Dyffryn can be enjoyed more throughout the sunniest month of May under a blue sky, with approximately 5.6 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 0.9 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit Dyffryn
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, July and August
- Warmest weather: June, July and August
- Most sunshine: May
- Seasonal pattern: Pleasant summers and cold winters
Frequently asked questions about the climate in Dyffryn
What is the best time to visit Dyffryn?
May, July and August typically offer the most optimal weather in Dyffryn. In contrast, January, February, March, November and December tend to have less optimal conditions. Dyffryn has pleasant summers and cold winters.
What temperatures can I expect in Dyffryn?
Daytime highs range from 9°C (48°F) in January to 19°C (66°F) in July. Nighttime lows range from 3°C (37°F) to 13°C (55°F).
How much rain does Dyffryn get?
Annual rainfall is around 1477 mm (58 in). December is the wettest month with 169 mm (6.7 in), while April is the driest with 90 mm (3.5 in).
How sunny is Dyffryn?
Dyffryn 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.
Dyffryn 3-Day Forecast
Dyffryn 3-Day Forecast
Dyffryn on the map
Dyffryn 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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