Letterkenny weather live forecast

Today's maximum temperature in Letterkenny is expected to be 66°F. Select a day from the live weather forecast for Letterkenny, Ireland for more weather parameters.

Friday
22nd May
66

54

2

UV4
Saturday
23rd May
64

50

3

UV3
Sunday
24th May
68

54

2

UV2
Monday
25th May
66

50

4

UV3
Tuesday
26th May
63

48

8

UV6

5-day weather forecast updated at 04:03 on Friday 22nd May 2026 GMT

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The 5-day weather forecast for Ireland (Letterkenny) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Letterkenny weather forecast by day

Below are the detailed weather forecasts for Letterkenny for the next 5 days.

Letterkenny weather for Friday 22nd May 2026

Expect mostly cloudy with light rain in Letterkenny, Ireland with a maximum temperature of 66°F, maximum UV of 4 (Moderate) and 2 hours of bright sunshine. There are 2-5 mm of rainfall expected with 87% chance of some rain and a moderate breeze of 14 mph from the south.

66
°F maximum temperature
54
°F minimum temperature
mostly cloudy with light rain
2
hours of sunshine
UV4
UV index (Moderate)
87
% chance of some rain
<5
mm of rainfall expected
66
°F wind chill
14
mph wind from S

Letterkenny weather for Saturday 23rd May 2026

Expect mostly cloudy with light rain in Letterkenny, Ireland with a maximum temperature of 64°F, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 0-2 mm of rainfall expected with 9% chance of some rain and a moderate breeze of 15 mph from the south-west.

64
°F maximum temperature
50
°F minimum temperature
mostly cloudy with light rain
3
hours of sunshine
UV3
UV index (Moderate)
9
% chance of some rain
<2
mm of rainfall expected
64
°F wind chill
15
mph wind from SW

Letterkenny weather for Sunday 24th May 2026

Expect broken clouds in Letterkenny, Ireland with a maximum temperature of 68°F, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 11 mph from the south-west.

68
°F maximum temperature
54
°F minimum temperature
broken clouds
2
hours of sunshine
UV2
UV index (Low)
0
mm of rainfall expected
0
no heat & humidity
11
mph wind from SW

Letterkenny weather for Monday 25th May 2026

Expect broken clouds in Letterkenny, Ireland with a maximum temperature of 66°F, maximum UV of 3 (Moderate) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 9 mph from the south-west.

66
°F maximum temperature
50
°F minimum temperature
broken clouds
4
hours of sunshine
UV3
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
9
mph wind from SW

Letterkenny weather for Tuesday 26th May 2026

Expect broken clouds in Letterkenny, Ireland with a maximum temperature of 63°F, maximum UV of 6 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the north-east.