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.

Wednesday
23rd Sep
15

8

5

2
Thursday
24th Sep
16

8

0

2
Friday
25th Sep
15

11

4

2
Saturday
26th Sep
16

11

4

2
Sunday
27th Sep
15

10

6

2

5-day weather forecast updated at 04:03 on Tuesday 22nd September 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 23rd September 2026

Expect sunshine and showers in Letterkenny, Ireland with a maximum temperature of 15°C, maximum UV of 2 (Low) and 5 hours of bright sunshine. There are 2-5 mm of rainfall expected with 15% chance of some rain and a gentle breeze of 14 kph from the north-west.

15
°C maximum temperature
8
°C minimum temperature
sunshine and showers
5
hours of sunshine
2
UV index (Low)
15
% chance of some rain
<5
mm of rainfall expected
15
°C wind chill
14
kph wind from NW

Letterkenny weather for Thursday 24th September 2026

Expect mostly cloudy with light rain in Letterkenny, Ireland with a maximum temperature of 16°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 0-2 mm of rainfall expected with 75% chance of some rain and a fresh breeze of 32 kph from the south.

16
°C maximum temperature
8
°C minimum temperature
mostly cloudy with light rain
0
hours of sunshine
2
UV index (Low)
75
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
32
kph wind from S

Letterkenny weather for Friday 25th September 2026

Expect mostly cloudy with light rain in Letterkenny, Ireland with a maximum temperature of 15°C, maximum UV of 2 (Low) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 44% chance of some rain and a moderate breeze of 21 kph from the south-west.

15
°C maximum temperature
11
°C minimum temperature
mostly cloudy with light rain
4
hours of sunshine
2
UV index (Low)
44
% chance of some rain
<2
mm of rainfall expected
15
°C wind chill
21
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 16°C, maximum UV of 2 (Low) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 66% chance of some rain and a moderate breeze of 28 kph from the south.

16
°C maximum temperature
11
°C minimum temperature
mostly cloudy with light rain
4
hours of sunshine
2
UV index (Low)
66
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
28
kph wind from S

Letterkenny weather for Sunday 27th September 2026

Expect sunshine and showers in Letterkenny, Ireland with a maximum temperature of 15°C, maximum UV of 2 (Low) and 6 hours of bright sunshine. There are 2-5 mm of rainfall expected with 90% chance of some rain and a moderate breeze of 27 kph from the south-west.