S
M
T
W
T
F
S
30
89°
67°
31
87°
68°
1
84°
68°
2
85°
67°
3
85°
68°
4
87°
67°
5
88°
68°
6
87°
67°
7
87°
67°
8
85°
66°
9
86°
67°
10
88°
67°
11
87°
66°
12
87°
66°
13
85°
64°
14
85°
64°
15
86°
65°
16
86°
64°
17
85°
64°
18
83°
63°
19
85°
64°
20
85°
64°
21
84°
61°
22
85°
61°
23
78°
60°
24
82°
59°
25
77°
58°
26
78°
55°
27
82°
57°
28
84°
59°
29
85°
59°
30
85°
58°
1
84°
57°
2
84°
58°
3
83°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Folsom
Folsom's September 2026 forecast shows daily high temperatures ranging from 77° to 89°, with overnight lows between 55° and 68°. The average high for September is 85° with an average low of 63°. 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.
