S
M
T
W
T
F
S
30
74°
60°
31
79°
64°
1
74°
55°
2
73°
54°
3
73°
55°
4
70°
57°
5
72°
59°
6
73°
61°
7
73°
64°
8
79°
61°
9
70°
52°
10
79°
52°
11
72°
52°
12
55°
46°
13
61°
39°
14
55°
39°
15
63°
45°
16
63°
48°
17
64°
42°
18
66°
48°
19
67°
49°
20
68°
49°
21
68°
48°
22
67°
49°
23
68°
46°
24
67°
49°
25
71°
54°
26
71°
53°
27
69°
52°
28
67°
46°
29
60°
39°
30
65°
45°
1
65°
44°
2
55°
44°
3
60°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Roosevelt
Roosevelt's September 2026 forecast shows daily high temperatures ranging from 55° to 71°, with overnight lows between 39° and 54°. The average high for September is 66° 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 Roosevelt. See also: October | November | December.