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