S
M
T
W
T
F
S
26
88°
63°
27
80°
62°
28
84°
63°
29
86°
64°
30
87°
65°
31
88°
65°
1
87°
64°
2
87°
64°
3
86°
63°
4
86°
63°
5
80°
62°
6
79°
62°
7
78°
61°
8
80°
62°
9
83°
63°
10
81°
62°
11
78°
56°
12
81°
53°
13
77°
60°
14
85°
61°
15
86°
52°
16
78°
51°
17
76°
48°
18
73°
49°
19
75°
51°
20
77°
54°
21
78°
55°
22
79°
59°
23
84°
58°
24
84°
49°
25
77°
47°
26
72°
48°
27
74°
51°
28
81°
58°
29
83°
59°
30
85°
50°
31
82°
45°
1
73°
53°
2
72°
57°
3
80°
48°
4
82°
44°
5
71°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Napoleon
Napoleon's August 2026 forecast shows daily high temperatures ranging from 71° to 88°, with overnight lows between 44° and 65°. The average high for August is 81° with an average low of 56°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Napoleon. See also: September | October | November.