S
M
T
W
T
F
S
28
70°
59°
29
66°
57°
30
70°
57°
1
67°
59°
2
66°
58°
3
69°
61°
4
69°
61°
5
69°
60°
6
70°
62°
7
70°
61°
8
71°
59°
9
73°
61°
10
71°
60°
11
72°
57°
12
70°
56°
13
71°
57°
14
66°
55°
15
73°
58°
16
72°
57°
17
71°
57°
18
71°
56°
19
70°
57°
20
66°
57°
21
66°
56°
22
68°
55°
23
71°
58°
24
72°
58°
25
73°
57°
26
73°
58°
27
72°
58°
28
70°
55°
29
66°
53°
30
67°
57°
31
68°
58°
1
71°
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 66° to 73°, with overnight lows between 53° and 62°. The average high for July is 70° with an average low of 58°. 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.
