S
M
T
W
T
F
S
30
78°
54°
31
80°
54°
1
79°
45°
2
76°
46°
3
71°
48°
4
74°
53°
5
76°
54°
6
77°
48°
7
76°
45°
8
71°
48°
9
71°
53°
10
69°
53°
11
75°
51°
12
73°
50°
13
68°
50°
14
66°
46°
15
67°
43°
16
66°
42°
17
67°
47°
18
67°
43°
19
69°
48°
20
68°
50°
21
71°
47°
22
69°
40°
23
65°
45°
24
64°
48°
25
66°
41°
26
66°
38°
27
Hist. Avg.
68°
42°
28
Hist. Avg.
67°
41°
29
Hist. Avg.
67°
41°
30
Hist. Avg.
66°
40°
1
Hist. Avg.
66°
40°
2
Hist. Avg.
65°
40°
3
Hist. Avg.
65°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Effingham
Effingham's September 2026 forecast shows daily high temperatures ranging from 64° to 80°, with overnight lows between 38° and 54°. The average high for September is 71° with an average low of 48°. 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 Effingham. See also: October | November | December.
