S
M
T
W
T
F
S
28
73°
57°
29
68°
54°
30
73°
59°
1
73°
61°
2
70°
52°
3
77°
56°
4
75°
57°
5
75°
58°
6
78°
58°
7
81°
60°
8
83°
61°
9
82°
61°
10
80°
60°
11
79°
58°
12
76°
56°
13
77°
57°
14
68°
56°
15
73°
57°
16
71°
56°
17
71°
56°
18
70°
57°
19
72°
57°
20
66°
56°
21
69°
56°
22
71°
54°
23
71°
57°
24
73°
58°
25
73°
58°
26
72°
57°
27
73°
57°
28
72°
56°
29
68°
53°
30
69°
57°
31
69°
57°
1
71°
56°
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 83°, with overnight lows between 52° and 61°. The average high for July is 73° 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.
