S
M
T
W
T
F
S
30
88°
78°
31
87°
79°
1
88°
78°
2
87°
79°
3
87°
77°
4
88°
77°
5
87°
78°
6
87°
78°
7
88°
77°
8
87°
78°
9
88°
77°
10
87°
78°
11
88°
77°
12
87°
76°
13
88°
77°
14
87°
76°
15
87°
76°
16
89°
78°
17
88°
77°
18
87°
76°
19
88°
77°
20
87°
76°
21
88°
77°
22
88°
77°
23
87°
76°
24
Hist. Avg.
86°
76°
25
Hist. Avg.
86°
76°
26
Hist. Avg.
86°
76°
27
Hist. Avg.
86°
76°
28
Hist. Avg.
86°
76°
29
Hist. Avg.
86°
76°
30
Hist. Avg.
86°
76°
1
Hist. Avg.
86°
76°
2
Hist. Avg.
86°
76°
3
Hist. Avg.
86°
76°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Colombo
Colombo's September 2026 forecast shows daily high temperatures ranging from 87° to 89°, with overnight lows between 76° and 79°. The average high for September is 88° with an average low of 77°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Colombo. See also: October | November | December.
