S
M
T
W
T
F
S
28
71°
54°
29
72°
53°
30
73°
57°
1
75°
61°
2
75°
61°
3
80°
56°
4
76°
54°
5
75°
54°
6
76°
52°
7
75°
60°
8
77°
56°
9
81°
54°
10
74°
54°
11
74°
55°
12
75°
62°
13
79°
58°
14
77°
55°
15
74°
57°
16
76°
55°
17
76°
55°
18
77°
56°
19
79°
59°
20
83°
59°
21
82°
64°
22
78°
63°
23
83°
56°
24
79°
54°
25
77°
59°
26
80°
60°
27
82°
61°
28
77°
58°
29
76°
60°
30
79°
58°
31
79°
58°
1
77°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Thornhill
Thornhill's July 2026 forecast shows daily high temperatures ranging from 71° to 83°, with overnight lows between 52° and 64°. The average high for July is 77° with an average low of 57°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Thornhill. See also: August | September | October.
