S
M
T
W
T
F
S
26
86°
65°
27
83°
62°
28
78°
53°
29
85°
48°
30
87°
60°
31
72°
62°
1
80°
58°
2
77°
49°
3
83°
48°
4
74°
56°
5
74°
47°
6
80°
44°
7
82°
57°
8
76°
52°
9
77°
49°
10
80°
49°
11
81°
53°
12
81°
52°
13
80°
51°
14
81°
46°
15
82°
55°
16
70°
49°
17
77°
45°
18
75°
44°
19
75°
38°
20
76°
40°
21
74°
47°
22
72°
47°
23
65°
39°
24
75°
34°
25
80°
42°
26
69°
57°
27
72°
46°
28
82°
46°
29
72°
56°
30
72°
60°
31
84°
64°
1
87°
53°
2
87°
57°
3
85°
55°
4
76°
66°
5
85°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Ontonagon
Ontonagon's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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 Ontonagon. See also: September | October | November.
