S
M
T
W
T
F
S
30
90°
54°
31
77°
55°
1
78°
56°
2
80°
55°
3
76°
55°
4
78°
54°
5
84°
49°
6
84°
52°
7
90°
52°
8
97°
53°
9
100°
72°
10
101°
64°
11
93°
60°
12
83°
51°
13
83°
55°
14
87°
58°
15
85°
56°
16
82°
58°
17
87°
59°
18
86°
59°
19
88°
59°
20
87°
61°
21
86°
57°
22
88°
56°
23
85°
59°
24
88°
58°
25
82°
55°
26
85°
61°
27
81°
57°
28
82°
55°
29
84°
58°
30
88°
60°
1
89°
60°
2
89°
61°
3
88°
60°
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 81° to 101°, with overnight lows between 51° and 72°. The average high for September is 87° with an average low of 59°. 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.
