Fahan Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Fahan.
Climate overview of Fahan
The climate in Fahan, Donegal County, Ireland, sees a moderate range of temperatures across the year, from 19°C (66°F) in July down to 9°C (48°F) in January.
The city has a wet climate, receiving around 1198 mm (47 in) of rainfall per year. August is the wettest month. Sunshine peaks in May, when the city sees around 6.8 hours of sunshine per day.
Fahan Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Fahan — and find the best time to visit.
Monthly Temperature in Fahan
In Fahan, seasonal changes bring about a moderate variation in temperatures. On average, daytime temperatures range from a pleasant 19°C (66°F) in July to a chilly 9°C (48°F) in January.
Nighttime temperatures range from 12°C (54°F) in July to 4°C (39°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Fahan
Fahan experiences significant rainfall throughout the year, averaging 1198 mm (47 in) of precipitation annually. The wettest period in Fahan occurs in August, which receives around 111 mm (4.4 in) of precipitation. During the driest month, March, Fahan experiences moderate rainfall, totaling 89 mm (3.5 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate. For more details, please visit our Fahan 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 Fahan
In Fahan, summer days are longer and more sunny, with daily sunshine hours peaking at 6.8 hours in May. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 1.3 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit Fahan
Frequently asked questions about the climate in Fahan
What is the best time to visit Fahan?
May, July, August and September typically offer the most optimal weather in Fahan. In contrast, January, February, November and December tend to have less optimal conditions.
What temperatures can I expect in Fahan?
Daytime highs range from 9°C (48°F) in January to 19°C (66°F) in July. Nighttime lows range from 4°C (39°F) to 12°C (54°F).
How much rain does Fahan get?
Annual rainfall is around 1198 mm (47 in). August is the wettest month with 111 mm (4.4 in), while March is the driest with 89 mm (3.5 in).
How sunny is Fahan?
Fahan receives around 1,342 hours of sunshine per year. May is the sunniest month with 203 hours, while December is the cloudiest with just 39 hours.
Fahan 3-Day Forecast
Fahan 3-Day Forecast
Fahan on the map
Fahan is highlighted — select any city to see its climate.
Popular this month
Where to go in July — average daytime high across popular destinations.
Cork
19°C (66°F) Kilkenny
20°C (68°F) Dublin20°C (68°F) Kenmare
19°C (66°F) Galway20°C (68°F) Killarney19°C (66°F) Westport19°C (66°F) Doolin18°C (64°F) 
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