S
M
T
W
T
F
S
30
66°
47°
31
66°
45°
1
67°
45°
2
66°
43°
3
65°
46°
4
66°
42°
5
66°
40°
6
65°
41°
7
64°
48°
8
67°
42°
9
67°
40°
10
62°
41°
11
61°
39°
12
61°
39°
13
61°
46°
14
60°
42°
15
60°
41°
16
Hist. Avg.
63°
42°
17
Hist. Avg.
63°
42°
18
Hist. Avg.
63°
42°
19
Hist. Avg.
62°
41°
20
Hist. Avg.
62°
41°
21
Hist. Avg.
62°
41°
22
Hist. Avg.
61°
40°
23
Hist. Avg.
61°
40°
24
Hist. Avg.
61°
40°
25
Hist. Avg.
60°
39°
26
Hist. Avg.
60°
39°
27
Hist. Avg.
59°
39°
28
Hist. Avg.
59°
38°
29
Hist. Avg.
59°
38°
30
Hist. Avg.
58°
38°
1
Hist. Avg.
58°
37°
2
Hist. Avg.
57°
37°
3
Hist. Avg.
57°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Petit-Cap
Petit-Cap's September 2026 forecast shows daily high temperatures ranging from 60° to 67°, with overnight lows between 39° and 48°. The average high for September is 64° with an average low of 43°. 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 Petit-Cap. See also: October | November | December.
