S
M
T
W
T
F
S
30
87°
64°
31
82°
72°
1
89°
73°
2
81°
71°
3
91°
74°
4
87°
66°
5
81°
61°
6
78°
63°
7
79°
62°
8
78°
63°
9
81°
64°
10
83°
65°
11
79°
64°
12
80°
61°
13
79°
62°
14
78°
61°
15
76°
63°
16
75°
65°
17
76°
57°
18
73°
56°
19
73°
56°
20
74°
58°
21
77°
63°
22
80°
63°
23
81°
64°
24
81°
62°
25
79°
58°
26
78°
60°
27
79°
61°
28
78°
61°
29
79°
60°
30
73°
55°
1
69°
53°
2
72°
57°
3
76°
59°
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 69° to 91°, with overnight lows between 53° and 74°. The average high for September is 79° with an average low of 62°. 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.
