Letterkenny weather by month

Check out Letterkenny weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in Letterkenny (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
7°C maximum daytime temperature in January in Letterkenny7
7°C maximum daytime temperature in February in Letterkenny7
8°C maximum daytime temperature in March in Letterkenny8
11°C maximum daytime temperature in April in Letterkenny11
13°C maximum daytime temperature in May in Letterkenny13
16°C maximum daytime temperature in June in Letterkenny16
17°C maximum daytime temperature in July in Letterkenny17
17°C maximum daytime temperature in August in Letterkenny17
15°C maximum daytime temperature in September in Letterkenny15
12°C maximum daytime temperature in October in Letterkenny12
9°C maximum daytime temperature in November in Letterkenny9
7°C maximum daytime temperature in December in Letterkenny7
Min temperature (night-time)
1°C minimum night-time temperature in January in Letterkenny1
1°C minimum night-time temperature in February in Letterkenny1
2°C minimum night-time temperature in March in Letterkenny2
3°C minimum night-time temperature in April in Letterkenny3
5°C minimum night-time temperature in May in Letterkenny5
8°C minimum night-time temperature in June in Letterkenny8
10°C minimum night-time temperature in July in Letterkenny10
10°C minimum night-time temperature in August in Letterkenny10
8°C minimum night-time temperature in September in Letterkenny8
7°C minimum night-time temperature in October in Letterkenny7
3°C minimum night-time temperature in November in Letterkenny3
2°C minimum night-time temperature in December in Letterkenny2
Heat & Humidity
No heat & humidity in January in Letterkenny0
No heat & humidity in February in Letterkenny0
No heat & humidity in March in Letterkenny0
No heat & humidity in April in Letterkenny0
No heat & humidity in May in Letterkenny0
No heat & humidity in June in Letterkenny0
No heat & humidity in July in Letterkenny0
No heat & humidity in August in Letterkenny0
No heat & humidity in September in Letterkenny0
No heat & humidity in October in Letterkenny0
No heat & humidity in November in Letterkenny0
No heat & humidity in December in Letterkenny0

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & Daylight in Letterkenny

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
8 hours of daylight per day in January in Letterkenny8
10 hours of daylight per day in February in Letterkenny10
12 hours of daylight per day in March in Letterkenny12
14 hours of daylight per day in April in Letterkenny14
16 hours of daylight per day in May in Letterkenny16
17 hours of daylight per day in June in Letterkenny17
17 hours of daylight per day in July in Letterkenny17
15 hours of daylight per day in August in Letterkenny15
13 hours of daylight per day in September in Letterkenny13
10 hours of daylight per day in October in Letterkenny10
8 hours of daylight per day in November in Letterkenny8
7 hours of daylight per day in December in Letterkenny7
UV Index (Maximum)
No UV (maximum) index in January in Letterkenny0
UV (maximum) index 1 (Low) in February in Letterkenny1
UV (maximum) index 2 (Low) in March in Letterkenny2
UV (maximum) index 3 (Moderate) in April in Letterkenny3
UV (maximum) index 5 (Moderate) in May in Letterkenny5
UV (maximum) index 6 (High) in June in Letterkenny6
UV (maximum) index 6 (High) in July in Letterkenny6
UV (maximum) index 5 (Moderate) in August in Letterkenny5
UV (maximum) index 3 (Moderate) in September in Letterkenny3
UV (maximum) index 2 (Low) in October in Letterkenny2
UV (maximum) index 1 (Low) in November in Letterkenny1
No UV (maximum) index in December in Letterkenny0

Rainfall in Letterkenny

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
24 days with some rainfall in January in Letterkenny24
19 days with some rainfall in February in Letterkenny19
22 days with some rainfall in March in Letterkenny22
18 days with some rainfall in April in Letterkenny18
19 days with some rainfall in May in Letterkenny19
19 days with some rainfall in June in Letterkenny19
20 days with some rainfall in July in Letterkenny20
21 days with some rainfall in August in Letterkenny21
22 days with some rainfall in September in Letterkenny22
23 days with some rainfall in October in Letterkenny23
23 days with some rainfall in November in Letterkenny23
23 days with some rainfall in December in Letterkenny23
Average monthly rainfall (mm)
137 mm monthly rainfall in January in Letterkenny137
96 mm monthly rainfall in February in Letterkenny96
98 mm monthly rainfall in March in Letterkenny98
74 mm monthly rainfall in April in Letterkenny74
82 mm monthly rainfall in May in Letterkenny82
78 mm monthly rainfall in June in Letterkenny78
87 mm monthly rainfall in July in Letterkenny87
98 mm monthly rainfall in August in Letterkenny98
120 mm monthly rainfall in September in Letterkenny120
132 mm monthly rainfall in October in Letterkenny132
137 mm monthly rainfall in November in Letterkenny137
141 mm monthly rainfall in December in Letterkenny141

More about Letterkenny

Letterkenny by month

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

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The climate guide for Ireland (Letterkenny) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Letterkenny?

Letterkenny has a temperate climate with warm summers and some rainfall in all months.

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

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Tropical storm risk: Letterkenny hurricane season

% of month affected by tropical storms
0
0
0
0
0
0
0
0
0
0
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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More about Ireland

Compare Letterkenny with the USA

Below the Letterkenny chart shows average maximum daytime temperature for Letterkenny, County Donegal, Ireland and the USA (Washington).

Maximum daytime temperature (°C)

Letterkenny, County Donegal, Ireland
USA (Washington)
7
5
7
7
8
13
11
19
13
24
16
29
17
31
17
30
15
26
12
20
9
14
7
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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

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