S
M
T
W
T
F
S
30
90°
54°
31
77°
55°
1
77°
55°
2
80°
56°
3
75°
57°
4
80°
55°
5
81°
57°
6
82°
59°
7
87°
61°
8
88°
63°
9
93°
65°
10
97°
66°
11
96°
63°
12
91°
61°
13
91°
62°
14
90°
58°
15
93°
62°
16
89°
61°
17
92°
61°
18
92°
60°
19
84°
57°
20
87°
58°
21
90°
60°
22
91°
61°
23
88°
56°
24
81°
53°
25
80°
54°
26
78°
54°
27
79°
53°
28
80°
53°
29
81°
54°
30
81°
56°
1
79°
52°
2
80°
53°
3
83°
56°
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 75° to 97°, with overnight lows between 52° and 66°. The average high for September is 85° with an average low of 58°. 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.
