S
M
T
W
T
F
S
30
83°
66°
31
89°
69°
1
93°
71°
2
94°
68°
3
91°
65°
4
84°
63°
5
84°
61°
6
85°
60°
7
87°
60°
8
85°
62°
9
79°
58°
10
80°
55°
11
80°
55°
12
80°
58°
13
81°
59°
14
81°
59°
15
80°
59°
16
80°
58°
17
79°
58°
18
77°
57°
19
79°
58°
20
80°
59°
21
80°
58°
22
79°
58°
23
80°
57°
24
79°
57°
25
79°
56°
26
77°
55°
27
78°
56°
28
78°
55°
29
77°
54°
30
75°
53°
1
74°
53°
2
75°
52°
3
75°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Napoleon
Napoleon's September 2026 forecast shows daily high temperatures ranging from 74° to 94°, with overnight lows between 52° and 71°. The average high for September is 81° with an average low of 59°. 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.
