Letterkenny weather live forecast

Today's maximum temperature in Letterkenny is expected to be 66°F. Select a day from the live weather forecast for Letterkenny, Ireland for more weather parameters.

Wednesday
26th Aug
66

57

3

2
Thursday
27th Aug
70

57

4

3
Friday
28th Aug
63

55

4

2
Saturday
29th Aug
61

52

2

2
Sunday
30th Aug
61

52

5

3

5-day weather forecast updated at 04:03 on Wednesday 26th August 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 Wednesday 26th August 2026

Expect mostly cloudy with light rain in Letterkenny, Ireland with a maximum temperature of 66°F, maximum UV of 2 (Low) and 3 hours of bright sunshine. There are 2-5 mm of rainfall expected with 44% chance of some rain and a moderate breeze of 13 mph from the south-east.

66
°F maximum temperature
57
°F minimum temperature
mostly cloudy with light rain
3
hours of sunshine
2
UV index (Low)
44
% chance of some rain
<5
mm of rainfall expected
66
°F wind chill
13
mph wind from SE

Letterkenny weather for Thursday 27th August 2026

Expect broken clouds in Letterkenny, Ireland with a maximum temperature of 70°F, maximum UV of 3 (Moderate) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 9 mph from the north-east.

70
°F maximum temperature
57
°F minimum temperature
broken clouds
4
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
9
mph wind from NE

Letterkenny weather for Friday 28th August 2026

Expect mostly cloudy with light rain in Letterkenny, Ireland with a maximum temperature of 63°F, maximum UV of 2 (Low) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 41% chance of some rain and a moderate breeze of 14 mph from the north-west.

63
°F maximum temperature
55
°F minimum temperature
mostly cloudy with light rain
4
hours of sunshine
2
UV index (Low)
41
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
14
mph wind from NW

Letterkenny weather for Saturday 29th August 2026

Expect mostly cloudy with light rain in Letterkenny, Ireland with a maximum temperature of 61°F, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 0-2 mm of rainfall expected with 55% chance of some rain and a light breeze of 7 mph from the west.

61
°F maximum temperature
52
°F minimum temperature
mostly cloudy with light rain
2
hours of sunshine
2
UV index (Low)
55
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
7
mph wind from W

Letterkenny weather for Sunday 30th August 2026

Expect mostly cloudy with light rain in Letterkenny, Ireland with a maximum temperature of 61°F, maximum UV of 3 (Moderate) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 69% chance of some rain and a moderate breeze of 14 mph from the west.