S
M
T
W
T
F
S
28
73°
57°
29
N/A
30
71°
55°
1
72°
61°
2
70°
52°
3
77°
59°
4
75°
58°
5
76°
57°
6
81°
61°
7
85°
63°
8
81°
60°
9
86°
62°
10
84°
63°
11
85°
61°
12
72°
57°
13
71°
56°
14
68°
56°
15
68°
53°
16
66°
56°
17
70°
56°
18
70°
55°
19
67°
54°
20
66°
54°
21
71°
57°
22
71°
57°
23
70°
58°
24
72°
58°
25
71°
57°
26
72°
56°
27
72°
56°
28
71°
58°
29
73°
58°
30
74°
57°
31
75°
60°
1
76°
58°
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 86°, with overnight lows between 52° and 63°. The average high for July is 74° 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.
