S
M
T
W
T
F
S
26
81°
55°
27
83°
58°
28
76°
62°
29
79°
59°
30
83°
55°
31
86°
51°
1
83°
65°
2
67°
59°
3
78°
54°
4
82°
50°
5
84°
56°
6
78°
61°
7
81°
56°
8
78°
63°
9
77°
55°
10
79°
64°
11
79°
54°
12
79°
52°
13
80°
54°
14
81°
53°
15
79°
54°
16
74°
55°
17
78°
54°
18
79°
51°
19
74°
56°
20
74°
48°
21
78°
46°
22
76°
54°
23
64°
56°
24
71°
55°
25
73°
50°
26
78°
61°
27
73°
50°
28
71°
46°
29
75°
51°
30
72°
60°
31
73°
57°
1
71°
54°
2
67°
51°
3
70°
52°
4
69°
53°
5
70°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Gravenhurst
Gravenhurst's August 2026 forecast shows daily high temperatures ranging from 67° to 78°, with overnight lows between 46° and 61°. The average high for August is 72° with an average low of 53°. 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 Gravenhurst. See also: September | October | November.
