S
M
T
W
T
F
S
30
91°
57°
31
93°
58°
1
94°
60°
2
91°
57°
3
89°
57°
4
89°
56°
5
90°
57°
6
90°
56°
7
89°
55°
8
89°
57°
9
88°
58°
10
88°
61°
11
87°
57°
12
88°
61°
13
90°
64°
14
94°
63°
15
93°
62°
16
95°
60°
17
94°
59°
18
93°
58°
19
92°
58°
20
91°
60°
21
93°
61°
22
93°
61°
23
92°
60°
24
86°
60°
25
82°
58°
26
82°
57°
27
81°
58°
28
83°
59°
29
84°
60°
30
83°
60°
1
82°
58°
2
82°
56°
3
Hist. Avg.
84°
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 81° to 95°, with overnight lows between 55° and 64°. The average high for September is 89° 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.
