S
M
T
W
T
F
S
30
72°
36°
31
71°
38°
1
70°
39°
2
70°
41°
3
69°
41°
4
71°
44°
5
71°
45°
6
73°
45°
7
74°
43°
8
73°
35°
9
65°
33°
10
60°
34°
11
61°
33°
12
60°
32°
13
58°
32°
14
58°
31°
15
59°
37°
16
61°
38°
17
64°
32°
18
61°
34°
19
58°
30°
20
58°
29°
21
56°
32°
22
57°
34°
23
65°
42°
24
65°
37°
25
Hist. Avg.
62°
30°
26
Hist. Avg.
62°
29°
27
Hist. Avg.
61°
29°
28
Hist. Avg.
61°
29°
29
Hist. Avg.
61°
28°
30
Hist. Avg.
60°
28°
1
Hist. Avg.
60°
28°
2
Hist. Avg.
60°
28°
3
Hist. Avg.
59°
27°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Harmattan
Harmattan's September 2026 forecast shows daily high temperatures ranging from 56° to 74°, with overnight lows between 29° and 45°. The average high for September is 65° with an average low of 36°. 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 Harmattan. See also: October | November | December.
