Letterkenny weather live forecast

Today's maximum temperature in Letterkenny is expected to be 15°C. Select a day from the live weather forecast for Letterkenny, Ireland for more weather parameters.

Friday
25th Sep
15

10

7

2
Saturday
26th Sep
17

11

4

2
Sunday
27th Sep
13

8

3

2
Monday
28th Sep
14

8

5

2
Tuesday
29th Sep
17

9

2

2

5-day weather forecast updated at 04:03 on Friday 25th September 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 25th September 2026

Expect broken clouds in Letterkenny, Ireland with a maximum temperature of 15°C, maximum UV of 2 (Low) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 23 kph from the south-west.

15
°C maximum temperature
10
°C minimum temperature
broken clouds
7
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
15
°C wind chill
23
kph wind from SW

Letterkenny weather for Saturday 26th September 2026

Expect mostly cloudy with light rain in Letterkenny, Ireland with a maximum temperature of 17°C, maximum UV of 2 (Low) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 35% chance of some rain and a fresh breeze of 29 kph from the south-west.

17
°C maximum temperature
11
°C minimum temperature
mostly cloudy with light rain
4
hours of sunshine
2
UV index (Low)
35
% chance of some rain
<2
mm of rainfall expected
17
°C wind chill
29
kph wind from SW

Letterkenny weather for Sunday 27th September 2026

Expect mostly cloudy with rain in Letterkenny, Ireland with a maximum temperature of 13°C, maximum UV of 2 (Low) and 3 hours of bright sunshine. There are 5-10 mm of rainfall expected with 91% chance of some rain and a fresh breeze of 29 kph from the south.

13
°C maximum temperature
8
°C minimum temperature
mostly cloudy with rain
3
hours of sunshine
2
UV index (Low)
91
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
29
kph wind from S

Letterkenny weather for Monday 28th September 2026

Expect broken clouds in Letterkenny, Ireland with a maximum temperature of 14°C, maximum UV of 2 (Low) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the south.

14
°C maximum temperature
8
°C minimum temperature
broken clouds
5
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
0
no heat & humidity
20
kph wind from S

Letterkenny weather for Tuesday 29th September 2026

Expect mostly cloudy with light rain in Letterkenny, Ireland with a maximum temperature of 17°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 2-5 mm of rainfall expected with 58% chance of some rain and a moderate breeze of 21 kph from the south-east.