Letterkenny weather live forecast

Today's maximum temperature in Letterkenny is expected to be 16°C. Select a day from the live weather forecast for Letterkenny, Ireland for more weather parameters.

Sunday
9th Aug
16

11

2

3
Monday
10th Aug
18

11

2

3
Tuesday
11th Aug
23

11

3

5
Wednesday
12th Aug
23

16

4

2
Thursday
13th Aug
22

16

3

4

5-day weather forecast updated at 04:03 on Sunday 9th 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 Sunday 9th August 2026

Expect mostly cloudy with rain in Letterkenny, Ireland with a maximum temperature of 16°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 5-10 mm of rainfall expected with 77% chance of some rain and a gentle breeze of 16 kph from the north-west.

16
°C maximum temperature
11
°C minimum temperature
mostly cloudy with rain
2
hours of sunshine
3
UV index (Moderate)
77
% chance of some rain
<10
mm of rainfall expected
16
°C wind chill
16
kph wind from NW

Letterkenny weather for Monday 10th August 2026

Expect broken clouds in Letterkenny, Ireland with a maximum temperature of 18°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the west.

18
°C maximum temperature
11
°C minimum temperature
broken clouds
2
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
18
°C wind chill
9
kph wind from W

Letterkenny weather for Tuesday 11th August 2026

Expect broken clouds in Letterkenny, Ireland with a maximum temperature of 23°C, maximum UV of 5 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 21 kph from the south.

23
°C maximum temperature
11
°C minimum temperature
broken clouds
3
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
23
°C wind chill
21
kph wind from S

Letterkenny weather for Wednesday 12th August 2026

Expect mostly cloudy with light rain in Letterkenny, Ireland with a maximum temperature of 23°C, maximum UV of 2 (Low) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 66% chance of some rain and a moderate breeze of 21 kph from the south.

23
°C maximum temperature
16
°C minimum temperature
mostly cloudy with light rain
4
hours of sunshine
2
UV index (Low)
66
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
21
kph wind from S

Letterkenny weather for Thursday 13th August 2026

Expect isolated thunderstorms in Letterkenny, Ireland with a maximum temperature of 22°C, maximum UV of 4 (Moderate) and 3 hours of bright sunshine. There are 5-10 mm of rainfall expected with 62% chance of some rain and a gentle breeze of 18 kph from the west.