S
M
T
W
T
F
S
30
80°
59°
31
75°
55°
1
80°
55°
2
82°
64°
3
84°
55°
4
85°
67°
5
86°
64°
6
80°
61°
7
85°
61°
8
87°
58°
9
91°
62°
10
91°
65°
11
91°
64°
12
83°
51°
13
85°
59°
14
86°
62°
15
84°
60°
16
84°
59°
17
85°
60°
18
85°
58°
19
84°
55°
20
68°
45°
21
73°
55°
22
68°
50°
23
68°
47°
24
69°
49°
25
68°
46°
26
70°
48°
27
69°
50°
28
67°
45°
29
66°
40°
30
62°
39°
1
63°
40°
2
64°
39°
3
66°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fillmore
Fillmore's September 2026 forecast shows daily high temperatures ranging from 62° to 91°, with overnight lows between 39° and 65°. The average high for September is 77° with an average low of 53°. 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 Fillmore. See also: October | November | December.
