Average data for 10 years
1 September
Monday
+18°
+13°
2 September
Tuesday
+18°
+13°
3 September
Wednesday
+20°
+13°
4 September
Thursday
+19°
+14°
5 September
Friday
+17°
+13°
6 September
Saturday
+18°
+12°
7 September
Sunday
+19°
+13°
8 September
Monday
+19°
+13°
9 September
Tuesday
+19°
+13°
10 September
Wednesday
+21°
+13°
11 September
Thursday
+20°
+14°
12 September
Friday
+18°
+14°
13 September
Saturday
+17°
+13°
14 September
Sunday
+17°
+12°
15 September
Monday
+16°
+12°
16 September
Tuesday
+17°
+11°
17 September
Wednesday
+16°
+12°
18 September
Thursday
+16°
+11°
19 September
Friday
+16°
+11°
20 September
Saturday
+16°
+10°
21 September
Sunday
+15°
+10°
22 September
Monday
+15°
+11°
23 September
Tuesday
+14°
+11°
24 September
Wednesday
+15°
+10°
25 September
Thursday
+16°
+10°
26 September
Friday
+16°
+10°
27 September
Saturday
+15°
+9°
28 September
Sunday
+13°
+9°
29 September
Monday
+14°
+9°
30 September
Tuesday
+13°
+9°
Cities with similar weather in September
Belarus
Gomel
Belarus
Mogilev
Latvia
Riga
Czech Republic
Karlovy Vary
Sweden
Stockholm
In September, the weather in Olsztyn is typically warm. Average daily high temperature in September is about 17 degrees above zero. On average, Olsztyn has 14 partly cloudy, 9 sunny, 6 rainy, and 1 cloudy day in September. The rains are usually light.