Letterkenny weather live forecast

Today's maximum temperature in Letterkenny is expected to be 27°C. Select a day from the live weather forecast for Letterkenny, Ireland for more weather parameters.

Thursday
16th Jul
27

14

16

5
Friday
17th Jul
18

12

3

5
Saturday
18th Jul
17

12

5

3
Sunday
19th Jul
18

11

4

5
Monday
20th Jul
18

12

2

5

5-day weather forecast updated at 04:03 on Thursday 16th July 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 Thursday 16th July 2026

Expect clear skies in Letterkenny, Ireland with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 16 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the north.

27
°C maximum temperature
14
°C minimum temperature
clear skies
16
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
L
low heat & humidity
17
kph wind from N

Letterkenny weather for Friday 17th July 2026

Expect broken clouds in Letterkenny, Ireland with a maximum temperature of 18°C, maximum UV of 5 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 24 kph from the north.

18
°C maximum temperature
12
°C minimum temperature
broken clouds
3
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
24
kph wind from N

Letterkenny weather for Saturday 18th July 2026

Expect broken clouds in Letterkenny, Ireland with a maximum temperature of 17°C, maximum UV of 3 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 25 kph from the north.

17
°C maximum temperature
12
°C minimum temperature
broken clouds
5
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
17
°C wind chill
25
kph wind from N

Letterkenny weather for Sunday 19th July 2026

Expect broken clouds in Letterkenny, Ireland with a maximum temperature of 18°C, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the north.

18
°C maximum temperature
11
°C minimum temperature
broken clouds
4
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
11
kph wind from N

Letterkenny weather for Monday 20th July 2026

Expect broken clouds in Letterkenny, Ireland with a maximum temperature of 18°C, maximum UV of 5 (Moderate) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 19 kph from the north.