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