S
M
T
W
T
F
S
30
82°
64°
31
84°
68°
1
93°
67°
2
89°
73°
3
77°
65°
4
82°
64°
5
80°
57°
6
78°
51°
7
80°
49°
8
82°
54°
9
82°
68°
10
78°
50°
11
78°
43°
12
86°
55°
13
76°
46°
14
71°
39°
15
75°
56°
16
71°
54°
17
69°
49°
18
70°
53°
19
60°
52°
20
70°
52°
21
63°
47°
22
66°
48°
23
71°
49°
24
69°
48°
25
72°
48°
26
72°
49°
27
73°
49°
28
70°
48°
29
69°
42°
30
67°
48°
1
71°
48°
2
62°
47°
3
60°
47°
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 60° to 73°, with overnight lows between 42° and 54°. The average high for September is 68° with an average low of 49°. 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.