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.

Tuesday
19th May
15

10

0

UV2
Wednesday
20th May
14

10

6

UV4
Thursday
21st May
19

11

1

UV2
Friday
22nd May
18

12

1

UV4
Saturday
23rd May
17

10

3

UV5

5-day weather forecast updated at 04:03 on Tuesday 19th 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 Tuesday 19th May 2026

Expect cloudy with some rain in Letterkenny, Ireland with a maximum temperature of 15°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 5-10 mm of rainfall expected with 92% chance of some rain and a moderate breeze of 23 kph from the south.

15
°C maximum temperature
10
°C minimum temperature
cloudy with some rain
0
hours of sunshine
UV2
UV index (Low)
92
% chance of some rain
<10
mm of rainfall expected
15
°C wind chill
23
kph wind from S

Letterkenny weather for Wednesday 20th May 2026

Expect mostly cloudy with light rain in Letterkenny, Ireland with a maximum temperature of 14°C, maximum UV of 4 (Moderate) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 48% chance of some rain and a moderate breeze of 25 kph from the west.

14
°C maximum temperature
10
°C minimum temperature
mostly cloudy with light rain
6
hours of sunshine
UV4
UV index (Moderate)
48
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
25
kph wind from W

Letterkenny weather for Thursday 21st May 2026

Expect cloudy with some rain in Letterkenny, Ireland with a maximum temperature of 19°C, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 5-10 mm of rainfall expected with 78% chance of some rain and a moderate breeze of 22 kph from the south.

19
°C maximum temperature
11
°C minimum temperature
cloudy with some rain
1
hour of sunshine
UV2
UV index (Low)
78
% chance of some rain
<10
mm of rainfall expected
19
°C wind chill
22
kph wind from S

Letterkenny weather for Friday 22nd May 2026

Expect mostly cloudy with light rain in Letterkenny, Ireland with a maximum temperature of 18°C, maximum UV of 4 (Moderate) and 1 hour of bright sunshine. There are 2-5 mm of rainfall expected with 63% chance of some rain and a gentle breeze of 16 kph from the south.

18
°C maximum temperature
12
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
UV4
UV index (Moderate)
63
% chance of some rain
<5
mm of rainfall expected
18
°C wind chill
16
kph wind from S

Letterkenny weather for Saturday 23rd May 2026

Expect mostly cloudy with light rain in Letterkenny, Ireland with a maximum temperature of 17°C, maximum UV of 5 (Moderate) and 3 hours of bright sunshine. There are 0-2 mm of rainfall expected with 27% chance of some rain and a gentle breeze of 16 kph from the south-west.