S
M
T
W
T
F
S
30
88°
62°
31
88°
63°
1
86°
62°
2
86°
64°
3
85°
64°
4
87°
62°
5
86°
64°
6
87°
65°
7
88°
60°
8
85°
58°
9
82°
58°
10
83°
59°
11
84°
59°
12
86°
62°
13
86°
63°
14
80°
58°
15
80°
57°
16
Hist. Avg.
81°
60°
17
Hist. Avg.
81°
60°
18
Hist. Avg.
80°
59°
19
Hist. Avg.
80°
59°
20
Hist. Avg.
80°
58°
21
Hist. Avg.
80°
58°
22
Hist. Avg.
79°
57°
23
Hist. Avg.
79°
57°
24
Hist. Avg.
78°
57°
25
Hist. Avg.
78°
56°
26
Hist. Avg.
78°
56°
27
Hist. Avg.
78°
55°
28
Hist. Avg.
77°
55°
29
Hist. Avg.
77°
54°
30
Hist. Avg.
76°
54°
1
Hist. Avg.
76°
54°
2
Hist. Avg.
76°
53°
3
Hist. Avg.
76°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Napoleon
Napoleon's September 2026 forecast shows daily high temperatures ranging from 80° to 88°, with overnight lows between 57° and 65°. The average high for September is 85° with an average low of 61°. 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 Napoleon. See also: October | November | December.
