The temperatures in Letterkenny in August are usually low and can range between 10°C and 17°C.
You can expect about 3 to 8 days of rain in Letterkenny during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Letterkenny in August 2025.
If you’re planning to visit Letterkenny in the near future, we highly recommend that you review the 14 day weather forecast for Letterkenny before you arrive.
Temperatures
17° / 10°
Rainy Days
6
Snowy Days
0
Dry Days
25
Rainfall
76
mm
Sun Hours
1.6
Hrs
