S
M
T
W
T
F
S
30
86°
68°
31
91°
70°
1
88°
68°
2
90°
64°
3
86°
72°
4
91°
73°
5
81°
66°
6
79°
66°
7
81°
64°
8
81°
64°
9
84°
59°
10
77°
54°
11
82°
55°
12
75°
55°
13
70°
48°
14
63°
60°
15
73°
50°
16
71°
60°
17
74°
56°
18
71°
65°
19
77°
55°
20
67°
51°
21
68°
50°
22
67°
49°
23
68°
51°
24
68°
53°
25
70°
53°
26
74°
50°
27
74°
51°
28
71°
50°
29
69°
50°
30
71°
47°
1
71°
47°
2
67°
46°
3
69°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Peterson
Peterson's September 2026 forecast shows daily high temperatures ranging from 63° to 77°, with overnight lows between 46° and 65°. The average high for September is 70° with an average low of 52°. 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 Peterson. See also: October | November | December.
