S
M
T
W
T
F
S
28
82°
59°
29
83°
61°
30
94°
70°
1
97°
75°
2
94°
74°
3
95°
74°
4
81°
72°
5
80°
67°
6
80°
64°
7
81°
69°
8
85°
68°
9
85°
68°
10
80°
67°
11
80°
67°
12
81°
62°
13
91°
63°
14
98°
73°
15
83°
71°
16
86°
67°
17
79°
65°
18
83°
63°
19
77°
61°
20
82°
56°
21
76°
60°
22
72°
54°
23
79°
54°
24
78°
55°
25
80°
62°
26
82°
62°
27
81°
66°
28
78°
63°
29
76°
61°
30
82°
63°
31
84°
65°
1
80°
66°
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 76° to 84°, with overnight lows between 61° and 66°. The average high for July is 80° with an average low of 64°. 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.
