S
M
T
W
T
F
S
26
84°
64°
27
84°
66°
28
81°
64°
29
81°
57°
30
88°
55°
31
88°
59°
1
79°
66°
2
79°
63°
3
82°
59°
4
82°
54°
5
84°
52°
6
86°
70°
7
84°
66°
8
88°
61°
9
86°
52°
10
84°
66°
11
77°
63°
12
75°
63°
13
79°
61°
14
82°
68°
15
79°
68°
16
84°
70°
17
81°
61°
18
81°
57°
19
82°
66°
20
79°
59°
21
81°
55°
22
77°
57°
23
75°
55°
24
77°
52°
25
77°
52°
26
81°
52°
27
83°
58°
28
81°
55°
29
83°
60°
30
86°
66°
31
92°
66°
1
93°
67°
2
87°
65°
3
88°
64°
4
86°
64°
5
84°
63°
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 81° to 93°, with overnight lows between 55° and 67°. The average high for August is 86° with an average low of 63°. 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.