Average data for 10 years
1 September
Sunday
+15°
+10°
2 September
Monday
+14°
+11°
3 September
Tuesday
+14°
+11°
4 September
Wednesday
+14°
+11°
5 September
Thursday
+15°
+11°
6 September
Friday
+16°
+11°
7 September
Saturday
+15°
+11°
8 September
Sunday
+15°
+11°
9 September
Monday
+15°
+11°
10 September
Tuesday
+16°
+11°
11 September
Wednesday
+15°
+12°
12 September
Thursday
+14°
+11°
13 September
Friday
+14°
+11°
14 September
Saturday
+14°
+11°
15 September
Sunday
+13°
+11°
16 September
Monday
+13°
+9°
17 September
Tuesday
+13°
+10°
18 September
Wednesday
+13°
+9°
19 September
Thursday
+12°
+9°
20 September
Friday
+12°
+9°
21 September
Saturday
+12°
+9°
22 September
Sunday
+11°
+9°
23 September
Monday
+12°
+8°
24 September
Tuesday
+12°
+9°
25 September
Wednesday
+12°
+8°
26 September
Thursday
+11°
+9°
27 September
Friday
+11°
+8°
28 September
Saturday
+11°
+8°
29 September
Sunday
+11°
+8°
30 September
Monday
+12°
+8°
Cities with similar weather in September
Finland
Helsinki
Latvia
Riga
Estonia
Tallinn
Sweden
Stockholm
Kyrgyzstan
Cholpon-Ata
In September, the weather in Trondheim is typically warm. Average daily high temperature in September is about 13 degrees above zero. On average, Trondheim has 13 rainy, 7 sunny, 5 cloudy, and 5 partly cloudy days in September. The rains are usually heavy.