S
M
T
W
T
F
S
30
81°
53°
31
81°
57°
1
80°
56°
2
80°
49°
3
79°
46°
4
72°
47°
5
72°
55°
6
75°
54°
7
79°
49°
8
72°
47°
9
71°
46°
10
72°
53°
11
71°
54°
12
79°
54°
13
78°
52°
14
78°
51°
15
76°
44°
16
70°
48°
17
68°
44°
18
70°
42°
19
68°
41°
20
66°
39°
21
64°
41°
22
66°
49°
23
66°
42°
24
67°
40°
25
65°
48°
26
70°
48°
27
68°
49°
28
73°
43°
29
72°
42°
30
63°
42°
1
64°
44°
2
70°
44°
3
Hist. Avg.
65°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Curtis
Curtis's September 2026 forecast shows daily high temperatures ranging from 63° to 81°, with overnight lows between 39° and 57°. The average high for September is 72° with an average low of 47°. 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 Curtis. See also: October | November | December.