Letterkenny weather live forecast

Today's maximum temperature in Letterkenny is expected to be 23°C. Select a day from the live weather forecast for Letterkenny, Ireland for more weather parameters.

Monday
25th May
23

10

10

UV6
Tuesday
26th May
19

9

11

UV4
Wednesday
27th May
25

9

13

UV6
Thursday
28th May
24

14

10

UV5
Friday
29th May
17

11

7

UV6

5-day weather forecast updated at 04:03 on Monday 25th May 2026 GMT

More about Letterkenny

Letterkenny by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Ireland

Fred Olsen: Top cruise offers for 2026/2027

Sale

Explore latest offers on Fred Olsen Cruises in 2026/2027
Find last minute deals or early bird discounts
Filter offers by price, destination, ship & departure point

Go to Fred Olsen deal >>

View all Fred Olsen offers

Cruise deal finder

Destination

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 Monday 25th May 2026

Expect scattered clouds in Letterkenny, Ireland with a maximum temperature of 23°C, maximum UV of 6 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the north.

23
°C maximum temperature
10
°C minimum temperature
scattered clouds
10
hours of sunshine
UV6
UV index (High)
0
mm of rainfall expected
23
°C wind chill
15
kph wind from N

Letterkenny weather for Tuesday 26th May 2026

Expect broken clouds in Letterkenny, Ireland with a maximum temperature of 19°C, maximum UV of 4 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 19 kph from the north-east.

19
°C maximum temperature
9
°C minimum temperature
broken clouds
11
hours of sunshine
UV4
UV index (Moderate)
0
mm of rainfall expected
19
°C wind chill
19
kph wind from NE

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 13 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 22 kph from the south-east.

25
°C maximum temperature
9
°C minimum temperature
scattered clouds
13
hours of sunshine
UV6
UV index (High)
0
mm of rainfall expected
25
°C wind chill
22
kph wind from SE

Letterkenny weather for Thursday 28th May 2026

Expect isolated thunderstorms in Letterkenny, Ireland with a maximum temperature of 24°C, maximum UV of 5 (Moderate) and 10 hours of bright sunshine. There are 0-2 mm of rainfall expected with 44% chance of some rain and a gentle breeze of 19 kph from the south-east.

24
°C maximum temperature
14
°C minimum temperature
isolated thunderstorms
10
hours of sunshine
UV5
UV index (Moderate)
44
% chance of some rain
<2
mm of rainfall expected
24
°C wind chill
19
kph wind from SE

Letterkenny weather for Friday 29th May 2026

Expect sunshine and showers in Letterkenny, Ireland with a maximum temperature of 17°C, maximum UV of 6 (High) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 25% chance of some rain and a moderate breeze of 24 kph from the west.