S
M
T
W
T
F
S
26
79°
61°
27
78°
61°
28
75°
60°
29
73°
60°
30
75°
61°
31
79°
62°
1
80°
60°
2
77°
60°
3
81°
60°
4
82°
51°
5
75°
52°
6
74°
54°
7
75°
56°
8
72°
55°
9
71°
55°
10
72°
56°
11
77°
59°
12
77°
59°
13
78°
54°
14
75°
51°
15
71°
50°
16
74°
54°
17
75°
52°
18
71°
51°
19
73°
50°
20
73°
50°
21
75°
56°
22
77°
58°
23
79°
58°
24
79°
59°
25
78°
57°
26
79°
58°
27
80°
55°
28
77°
58°
29
77°
55°
30
75°
49°
31
71°
46°
1
66°
48°
2
66°
45°
3
67°
46°
4
67°
46°
5
66°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Orillia
Orillia's August 2026 forecast shows daily high temperatures ranging from 66° to 82°, with overnight lows between 45° and 62°. The average high for August is 75° with an average low of 55°. 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 Orillia. See also: September | October | November.
