S
M
T
W
T
F
S
28
68°
58°
29
66°
56°
30
70°
57°
1
64°
57°
2
63°
56°
3
66°
53°
4
68°
61°
5
66°
60°
6
70°
61°
7
68°
61°
8
71°
58°
9
71°
59°
10
81°
63°
11
81°
60°
12
77°
54°
13
76°
53°
14
77°
56°
15
76°
59°
16
75°
58°
17
76°
58°
18
71°
56°
19
70°
57°
20
65°
53°
21
65°
55°
22
66°
52°
23
65°
52°
24
66°
53°
25
70°
57°
26
70°
55°
27
69°
55°
28
69°
58°
29
66°
57°
30
66°
55°
31
65°
53°
1
66°
53°
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 65° to 81°, with overnight lows between 52° and 63°. The average high for July is 71° with an average low of 56°. 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.
