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

Recommended for Ireland

Buyagift: Food & drink experience offers

Sale

Save on dining out & afternoon tea in London & beyond
Try cooking lessons, drink making, tasting & tours
Check out bestselling experiences or search by region

Go to Buyagift deal >>

View all Buyagift offers

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 [remove]
Daily hours of sunshine = 10 hours or more [remove]

Change the criteria to reflect your weather preferences.

0
Jan
0
Feb
0
Mar
1
Apr
1
May
1
Jun
1
Jul
1
Aug
0
Sep
0
Oct
0
Nov
0
Dec

Change criteria

Max Day Temperature (°C)

6
Jan
6
Feb
8
Mar
11
Apr
14
May
16
Jun
17
Jul
17
Aug
15
Sep
12
Oct
8
Nov
7
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

Best time to visit

Destination

Daytime temperature

Sunshine hours

Sea temperature

Monthly rainfall

Days with some rain

Heat & humidity

The weather guide for Ireland (Donegal) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)