S
M
T
W
T
F
S
30
70°
58°
31
70°
61°
1
71°
61°
2
72°
60°
3
76°
62°
4
76°
61°
5
74°
59°
6
71°
60°
7
68°
59°
8
69°
58°
9
73°
59°
10
74°
59°
11
76°
58°
12
76°
58°
13
74°
59°
14
75°
56°
15
65°
53°
16
64°
51°
17
66°
55°
18
69°
56°
19
71°
55°
20
66°
56°
21
72°
50°
22
72°
50°
23
70°
49°
24
71°
43°
25
72°
43°
26
65°
52°
27
71°
51°
28
71°
53°
29
72°
38°
30
70°
40°
1
58°
43°
2
64°
47°
3
64°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Underwood
Underwood's September 2026 forecast shows daily high temperatures ranging from 58° to 76°, with overnight lows between 38° and 62°. The average high for September is 70° with an average low of 54°. 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 Underwood. See also: October | November | December.
