Average data for 10 years
1 September
Monday
+20°
+11°
2 September
Tuesday
+20°
+11°
3 September
Wednesday
+20°
+12°
4 September
Thursday
+20°
+12°
5 September
Friday
+20°
+12°
6 September
Saturday
+20°
+12°
7 September
Sunday
+20°
+12°
8 September
Monday
+19°
+12°
9 September
Tuesday
+19°
+12°
10 September
Wednesday
+19°
+11°
11 September
Thursday
+19°
+11°
12 September
Friday
+19°
+11°
13 September
Saturday
+18°
+10°
14 September
Sunday
+18°
+10°
15 September
Monday
+18°
+10°
16 September
Tuesday
+18°
+10°
17 September
Wednesday
+18°
+10°
18 September
Thursday
+18°
+10°
19 September
Friday
+18°
+11°
20 September
Saturday
+18°
+11°
21 September
Sunday
+18°
+10°
22 September
Monday
+18°
+10°
23 September
Tuesday
+17°
+10°
24 September
Wednesday
+17°
+9°
25 September
Thursday
+17°
+9°
26 September
Friday
+17°
+10°
27 September
Saturday
+17°
+10°
28 September
Sunday
+17°
+10°
29 September
Monday
+17°
+10°
30 September
Tuesday
+16°
+10°
Cities near you
France
Paris
United Kingdom
London
United Kingdom
Manchester
United Kingdom
Liverpool
United Kingdom
Trowbridge
Cities with similar weather in September
Latvia
Riga
Sweden
Stockholm
Australia
Sydney
Latvia
Yurmala
Lithuania
Palanga
In September, the weather in Portsmouth is typically warm. Average daily high temperature in September is about 18 degrees above zero. On average, Portsmouth has 12 partly cloudy, 10 rainy, 5 sunny, and 3 cloudy days in September. The rains are usually moderate.