S
M
T
W
T
F
S
30
87°
67°
31
88°
67°
1
89°
68°
2
91°
69°
3
90°
68°
4
91°
68°
5
86°
67°
6
86°
64°
7
89°
64°
8
90°
66°
9
89°
67°
10
90°
66°
11
90°
66°
12
89°
65°
13
88°
64°
14
89°
65°
15
89°
65°
16
83°
64°
17
89°
65°
18
88°
65°
19
Hist. Avg.
85°
62°
20
Hist. Avg.
85°
61°
21
Hist. Avg.
85°
61°
22
Hist. Avg.
85°
61°
23
Hist. Avg.
84°
60°
24
Hist. Avg.
84°
60°
25
Hist. Avg.
84°
60°
26
Hist. Avg.
83°
59°
27
Hist. Avg.
83°
59°
28
Hist. Avg.
83°
58°
29
Hist. Avg.
82°
58°
30
Hist. Avg.
82°
57°
1
Hist. Avg.
82°
57°
2
Hist. Avg.
82°
56°
3
Hist. Avg.
81°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Folsom
Folsom's September 2026 forecast shows daily high temperatures ranging from 83° to 91°, with overnight lows between 64° and 69°. The average high for September is 89° with an average low of 66°. 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 Folsom. See also: October | November | December.
