Annual mean 10°C · wettest around February · prevailing wind SW
Warmest
17.8 °C
Coldest
6.3 °C
Wettest
40%
Windiest
7.1 m/s
Prevailing
SW
5.6 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Donegal over the whole year is 10°C. August is the hottest month, with highs of about 17°C; January is the coldest, with lows of about 5°C. Donegal has no sharply defined rainy season: the chance of rain on a given day runs from 20% in May, the driest month, to 36% in February, the wettest. Winds in Donegal are highest in February, averaging 6.1 m/s (22 km/h), and lightest in July, at 4.1 m/s (15 km/h). The prevailing wind is from the SW. The clearest skies in Donegal come in May, when the sky is typically 70% covered; July is the cloudiest month, at 81%.
Month by month Donegal climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
7°C
5°C
1°C
32%
78%
5.3 m/s
0
0
13
February
8°C
5°C
2°C
36%
75%
6.1 m/s
0
0
14
March
9°C
5°C
4°C
30%
76%
5.0 m/s
0
0
26
April
11°C
7°C
6°C
21%
72%
4.6 m/s
4
0
47
May
15°C
9°C
11°C
20%
70%
4.2 m/s
20
0
73
June
16°C
12°C
13°C
24%
77%
4.3 m/s
34
1
78
July
17°C
13°C
14°C
26%
81%
4.1 m/s
45
3
80
August
17°C
13°C
14°C
31%
77%
4.3 m/s
46
1
79
September
15°C
12°C
12°C
29%
75%
4.3 m/s
28
1
74
October
13°C
10°C
8°C
30%
75%
4.9 m/s
4
0
61
November
9°C
7°C
5°C
31%
77%
4.8 m/s
1
0
33
December
7°C
6°C
2°C
34%
78%
5.3 m/s
0
0
17
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Donegal weather by season
Year round, Donegal has days of about 7°C at their warmest in January, its coolest month, and 17°C in August, its warmest; the coolest hours of the day run from 5°C to 13°C through the year, and the average temperature over the year is 10°C around the clock. Rain is most likely around February and least likely around May. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Donegal weather in winterDecember to February
High 7°CLow 5°CRain 34%
Winter in Donegal has typical daily highs of about 7°C and lows of about 5°C, with a 34% chance of rain on a given day.
Donegal weather in springMarch to May
High 12°CLow 7°CRain 24%
Spring in Donegal has typical daily highs of about 12°C and lows of about 7°C, with a 24% chance of rain on a given day.
Donegal weather in summerJune to August
High 17°CLow 13°CRain 27%
Summer in Donegal has typical daily highs of about 17°C and lows of about 13°C, with a 27% chance of rain on a given day.
Donegal weather in autumnSeptember to November
High 12°CLow 9°CRain 30%
Autumn in Donegal has typical daily highs of about 12°C and lows of about 9°C, with a 30% chance of rain on a given day.
When is the rainy season in Donegal?
Donegal has no sharply defined rainy season: the chance of rain on a given day runs from 20% in May, the driest month, to 36% in February, the wettest.
What time of year is Donegal windiest?
Winds in Donegal are highest in February, averaging 6.1 m/s (22 km/h), and lightest in July, at 4.1 m/s (15 km/h). The prevailing wind is from the SW.
What is the average temperature in Donegal year round?
The average temperature in Donegal over the whole year is 10°C. August is the hottest month, with highs of about 17°C; January is the coldest, with lows of about 5°C.