S
M
T
W
T
F
S
26
82°
62°
27
84°
63°
28
80°
68°
29
80°
65°
30
83°
61°
31
83°
68°
1
80°
66°
2
74°
59°
3
78°
59°
4
80°
65°
5
82°
65°
6
81°
65°
7
80°
63°
8
80°
65°
9
79°
64°
10
80°
63°
11
79°
65°
12
78°
59°
13
81°
63°
14
81°
59°
15
73°
56°
16
72°
57°
17
73°
62°
18
74°
61°
19
73°
60°
20
72°
59°
21
72°
55°
22
71°
55°
23
71°
54°
24
70°
56°
25
71°
56°
26
70°
58°
27
71°
57°
28
70°
54°
29
71°
55°
30
70°
59°
31
76°
62°
1
73°
62°
2
74°
58°
3
69°
56°
4
69°
56°
5
70°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Thornhill
Thornhill's August 2026 forecast shows daily high temperatures ranging from 69° to 83°, with overnight lows between 54° and 68°. The average high for August is 75° with an average low of 60°. 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 Thornhill. See also: September | October | November.
