S
M
T
W
T
F
S
30
74°
52°
31
71°
53°
1
72°
57°
2
73°
54°
3
74°
53°
4
73°
54°
5
76°
54°
6
73°
52°
7
84°
50°
8
89°
54°
9
95°
62°
10
93°
68°
11
83°
57°
12
73°
54°
13
74°
57°
14
82°
51°
15
77°
52°
16
69°
55°
17
72°
57°
18
73°
57°
19
74°
55°
20
71°
54°
21
70°
55°
22
70°
54°
23
75°
51°
24
85°
55°
25
78°
55°
26
75°
47°
27
72°
53°
28
73°
51°
29
83°
49°
30
87°
53°
1
83°
52°
2
81°
56°
3
97°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fremont
Fremont's September 2026 forecast shows daily high temperatures ranging from 97° to 97°, with overnight lows between 62° and 62°. The average high for September is 97° 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 Fremont. See also: October | November | December.