S
M
T
W
T
F
S
28
68°
58°
29
66°
56°
30
70°
57°
1
64°
57°
2
64°
59°
3
65°
61°
4
67°
60°
5
66°
59°
6
66°
60°
7
67°
60°
8
70°
57°
9
72°
59°
10
70°
57°
11
70°
56°
12
69°
56°
13
69°
55°
14
70°
58°
15
71°
57°
16
70°
56°
17
70°
57°
18
69°
57°
19
68°
56°
20
65°
57°
21
66°
56°
22
66°
54°
23
69°
58°
24
70°
58°
25
71°
57°
26
71°
57°
27
70°
56°
28
66°
55°
29
66°
53°
30
65°
56°
31
68°
58°
1
69°
57°
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 64° to 72°, with overnight lows between 53° and 61°. The average high for July is 68° 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.
