Letterkenny weather live forecast

Today's maximum temperature in Letterkenny is expected to be 25°C. Select a day from the live weather forecast for Letterkenny, Ireland for more weather parameters.

Wednesday
27th May
25

9

12

6
Thursday
28th May
25

15

8

4
Friday
29th May
18

12

6

5
Saturday
30th May
16

11

1

2
Sunday
31st May
17

12

4

4

5-day weather forecast updated at 04:03 on Wednesday 27th 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 Wednesday 27th May 2026

Expect scattered clouds in Letterkenny, Ireland with a maximum temperature of 25°C, maximum UV of 6 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 19 kph from the south-east.

25
°C maximum temperature
9
°C minimum temperature
scattered clouds
12
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
19
kph wind from SE

Letterkenny weather for Thursday 28th May 2026

Expect broken clouds in Letterkenny, Ireland with a maximum temperature of 25°C, maximum UV of 4 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 24 kph from the south-west.

25
°C maximum temperature
15
°C minimum temperature
broken clouds
8
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
24
kph wind from SW

Letterkenny weather for Friday 29th May 2026

Expect broken clouds in Letterkenny, Ireland with a maximum temperature of 18°C, maximum UV of 5 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 26 kph from the south-west.

18
°C maximum temperature
12
°C minimum temperature
broken clouds
6
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
26
kph wind from SW

Letterkenny weather for Saturday 30th May 2026

Expect mostly cloudy with light rain in Letterkenny, Ireland with a maximum temperature of 16°C, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 2-5 mm of rainfall expected with 83% chance of some rain and a moderate breeze of 21 kph from the south.

16
°C maximum temperature
11
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
2
UV index (Low)
83
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
21
kph wind from S

Letterkenny weather for Sunday 31st May 2026

Expect mostly cloudy with light rain in Letterkenny, Ireland with a maximum temperature of 17°C, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 65% chance of some rain and a moderate breeze of 25 kph from the west.