S
M
T
W
T
F
S
28
77°
55°
29
73°
52°
30
73°
57°
1
75°
57°
2
77°
54°
3
74°
54°
4
75°
59°
5
74°
60°
6
75°
60°
7
77°
59°
8
76°
61°
9
79°
60°
10
77°
60°
11
77°
61°
12
76°
61°
13
76°
60°
14
79°
61°
15
78°
56°
16
76°
54°
17
76°
54°
18
75°
55°
19
76°
57°
20
77°
54°
21
82°
57°
22
82°
60°
23
79°
61°
24
84°
54°
25
80°
53°
26
77°
53°
27
77°
52°
28
78°
56°
29
77°
57°
30
80°
59°
31
83°
60°
1
83°
60°
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 73° to 84°, with overnight lows between 52° and 61°. 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 Thornton. See also: August | September | October.
