Letterkenny weather live forecast

Today's maximum temperature in Letterkenny is expected to be 75°F. Select a day from the live weather forecast for Letterkenny, Ireland for more weather parameters.

Tuesday
11th Aug
75

52

6

5
Wednesday
12th Aug
75

63

2

3
Thursday
13th Aug
73

59

2

3
Friday
14th Aug
63

55

3

3
Saturday
15th Aug
63

54

2

3

5-day weather forecast updated at 04:03 on Tuesday 11th August 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 Tuesday 11th August 2026

Expect mostly cloudy with light rain in Letterkenny, Ireland with a maximum temperature of 75°F, maximum UV of 5 (Moderate) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 25% chance of some rain and a moderate breeze of 12 mph from the south.

75
°F maximum temperature
52
°F minimum temperature
mostly cloudy with light rain
6
hours of sunshine
5
UV index (Moderate)
25
% chance of some rain
<2
mm of rainfall expected
75
°F wind chill
12
mph wind from S

Letterkenny weather for Wednesday 12th August 2026

Expect mostly cloudy with light rain in Letterkenny, Ireland with a maximum temperature of 75°F, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 0-2 mm of rainfall expected with 49% chance of some rain and a moderate breeze of 13 mph from the south.

75
°F maximum temperature
63
°F minimum temperature
mostly cloudy with light rain
2
hours of sunshine
3
UV index (Moderate)
49
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
13
mph wind from S

Letterkenny weather for Thursday 13th August 2026

Expect isolated thunderstorms in Letterkenny, Ireland with a maximum temperature of 73°F, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 10-20 mm of rainfall expected with 70% chance of some rain and a moderate breeze of 12 mph from the south-west.

73
°F maximum temperature
59
°F minimum temperature
isolated thunderstorms
2
hours of sunshine
3
UV index (Moderate)
70
% chance of some rain
<20
mm of rainfall expected
73
°F wind chill
12
mph wind from SW

Letterkenny weather for Friday 14th August 2026

Expect broken clouds in Letterkenny, Ireland with a maximum temperature of 63°F, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 14 mph from the west.

63
°F maximum temperature
55
°F minimum temperature
broken clouds
3
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
63
°F wind chill
14
mph wind from W

Letterkenny weather for Saturday 15th August 2026

Expect broken clouds in Letterkenny, Ireland with a maximum temperature of 63°F, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 11 mph from the west.