S
M
T
W
T
F
S
26
85°
64°
27
86°
64°
28
85°
65°
29
86°
63°
30
85°
64°
31
85°
63°
1
82°
62°
2
78°
59°
3
78°
62°
4
81°
63°
5
81°
62°
6
84°
62°
7
84°
62°
8
85°
63°
9
85°
64°
10
84°
63°
11
85°
63°
12
85°
62°
13
86°
64°
14
87°
61°
15
87°
61°
16
78°
62°
17
83°
59°
18
83°
59°
19
85°
55°
20
81°
53°
21
77°
52°
22
77°
53°
23
78°
55°
24
78°
52°
25
77°
55°
26
78°
56°
27
78°
54°
28
82°
53°
29
76°
53°
30
75°
52°
31
75°
52°
1
76°
53°
2
75°
52°
3
76°
52°
4
77°
51°
5
77°
51°
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 75° to 87°, with overnight lows between 51° and 65°. The average high for August is 81° with an average low of 58°. 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.