Letterkenny weather live forecast

Today's maximum temperature in Letterkenny is expected to be 20°C. Select a day from the live weather forecast for Letterkenny, Ireland for more weather parameters.

Tuesday
25th Aug
20

11

1

3
Wednesday
26th Aug
19

14

1

2
Thursday
27th Aug
21

14

2

2
Friday
28th Aug
16

12

0

1
Saturday
29th Aug
17

12

1

2

5-day weather forecast updated at 04:03 on Tuesday 25th August 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 25th August 2026

Expect mostly cloudy with light rain in Letterkenny, Ireland with a maximum temperature of 20°C, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 2-5 mm of rainfall expected with 68% chance of some rain and a moderate breeze of 20 kph from the south-east.

20
°C maximum temperature
11
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
3
UV index (Moderate)
68
% chance of some rain
<5
mm of rainfall expected
20
°C wind chill
20
kph wind from SE

Letterkenny weather for Wednesday 26th August 2026

Expect mostly cloudy with 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 51% chance of some rain and a gentle breeze of 18 kph from the south-east.

19
°C maximum temperature
14
°C minimum temperature
mostly cloudy with rain
1
hour of sunshine
2
UV index (Low)
51
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
18
kph wind from SE

Letterkenny weather for Thursday 27th August 2026

Expect isolated thunderstorms in Letterkenny, Ireland with a maximum temperature of 21°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 2-5 mm of rainfall expected with 75% chance of some rain and a gentle breeze of 15 kph from the north-east.

21
°C maximum temperature
14
°C minimum temperature
isolated thunderstorms
2
hours of sunshine
2
UV index (Low)
75
% chance of some rain
<5
mm of rainfall expected
21
°C wind chill
15
kph wind from NE

Letterkenny weather for Friday 28th August 2026

Expect overcast with light rain in Letterkenny, Ireland with a maximum temperature of 16°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 2-5 mm of rainfall expected with 56% chance of some rain and a moderate breeze of 22 kph from the north-west.

16
°C maximum temperature
12
°C minimum temperature
overcast with light rain
0
hours of sunshine
1
UV index (Low)
56
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
22
kph wind from NW

Letterkenny weather for Saturday 29th August 2026

Expect mostly cloudy with light rain in Letterkenny, Ireland with a maximum temperature of 17°C, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 2-5 mm of rainfall expected with 49% chance of some rain and a gentle breeze of 17 kph from the west.