Which is the warmest month in Donegal?

The warmest time of year in Donegal is normally July. Expect maximum daytime temperatures to reach 17°C.

Which month has the most rain in Donegal?

In terms of rainfall, December is usually the wettest month in Donegal with 173mm on average. There are normally 24 days in December with some rain.

When is it sunniest in Donegal?

The sunniest time of year in Donegal is normally April with bright sunshine on average for 33% of daylight hours; that's 5 hours of sunshine per day.

When is the sea warmest in Donegal?

The sea is usually at its warmest in Donegal in August when the water temperature reaches 16°C.

Best time to visit Donegal

Q: When is the best time to visit Donegal?

The best time to visit Donegal is July and August based on the following average weather conditions. Maximum daytime temperature = 22 - 30°C. Daily hours of sunshine = 10 hours or more.

Find the best time to visit Donegal and plan your perfect trip in 2025/2026. Get holiday inspiration, weather guides, travel advice and find great deals.

Donegal by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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When is the best time to visit Donegal?

The best time to visit Donegal is July and August based on the following average weather conditions.

Maximum daytime temperature = 72 - 86°F [remove]
Daily hours of sunshine = 10 hours or more [remove]

Change the criteria to reflect your weather preferences.

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Jan
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Feb
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Mar
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Apr
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May
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Jun
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Jul
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Aug
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Sep
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Change criteria

Max Day Temperature (°F)

43
Jan
43
Feb
46
Mar
52
Apr
57
May
61
Jun
63
Jul
63
Aug
59
Sep
54
Oct
46
Nov
45
Dec

Hours of Sunshine (daily)

1
Jan
2
Feb
3
Mar
5
Apr
5
May
5
Jun
4
Jul
4
Aug
3
Sep
3
Oct
2
Nov
1
Dec