S
M
T
W
T
F
S
30
91°
63°
31
82°
63°
1
73°
57°
2
75°
63°
3
68°
63°
4
75°
55°
5
81°
55°
6
82°
59°
7
90°
54°
8
95°
57°
9
102°
63°
10
97°
73°
11
91°
68°
12
90°
66°
13
81°
57°
14
90°
59°
15
86°
61°
16
81°
59°
17
75°
57°
18
88°
57°
19
93°
61°
20
84°
63°
21
84°
64°
22
84°
57°
23
91°
61°
24
91°
63°
25
84°
66°
26
81°
57°
27
81°
57°
28
88°
50°
29
95°
59°
30
90°
63°
1
93°
59°
2
97°
61°
3
97°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Chico
Chico's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Chico. See also: October | November | December.
