Average data for 10 years
1 September
Sunday
+14°
+12°
2 September
Monday
+14°
+12°
3 September
Tuesday
+14°
+12°
4 September
Wednesday
+13°
+12°
5 September
Thursday
+13°
+12°
6 September
Friday
+13°
+12°
7 September
Saturday
+14°
+12°
8 September
Sunday
+14°
+12°
9 September
Monday
+15°
+12°
10 September
Tuesday
+14°
+12°
11 September
Wednesday
+14°
+11°
12 September
Thursday
+14°
+11°
13 September
Friday
+13°
+11°
14 September
Saturday
+13°
+11°
15 September
Sunday
+12°
+10°
16 September
today
+12°
+10°
17 September
tomorrow
+13°
+11°
18 September
Wednesday
+13°
+11°
19 September
Thursday
+13°
+11°
20 September
Friday
+14°
+11°
21 September
Saturday
+13°
+11°
22 September
Sunday
+13°
+11°
23 September
Monday
+12°
+11°
24 September
Tuesday
+13°
+11°
25 September
Wednesday
+13°
+11°
26 September
Thursday
+14°
+12°
27 September
Friday
+14°
+12°
28 September
Saturday
+14°
+11°
29 September
Sunday
+13°
+11°
30 September
Monday
+13°
+10°
Cities near you
Ireland
Dublin
United Kingdom
Glasgow
Ireland
Wicklow
Ireland
Tullamore
United Kingdom
Belfast
Cities with similar weather in September
Belarus
Minsk
Finland
Helsinki
Czech Republic
Karlovy Vary
Estonia
Tallinn
Belarus
Vitebsk
In September, the weather in Letterkenny is typically warm. Average daily high temperature in September is about 13 degrees above zero. On average, Letterkenny has 26 rainy, 2 sunny, and 2 cloudy days in September. The rains are usually heavy. September as well as January, February, March, and April is considered the most uncomfortable time to visit Letterkenny.