S
M
T
W
T
F
S
30
73°
40°
31
73°
40°
1
72°
38°
2
64°
33°
3
65°
34°
4
70°
38°
5
74°
36°
6
62°
27°
7
61°
26°
8
63°
30°
9
67°
31°
10
73°
37°
11
73°
37°
12
72°
36°
13
69°
34°
14
68°
31°
15
62°
29°
16
62°
33°
17
67°
36°
18
58°
33°
19
58°
25°
20
60°
27°
21
63°
34°
22
67°
34°
23
70°
31°
24
56°
28°
25
56°
24°
26
54°
24°
27
53°
22°
28
52°
20°
29
54°
20°
30
55°
25°
1
58°
27°
2
61°
27°
3
56°
22°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Calendar
Calendar's September 2026 forecast shows daily high temperatures ranging from 52° to 74°, with overnight lows between 20° and 40°. The average high for September is 63° with an average low of 31°. 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 Calendar. See also: October | November | December.
