S
M
T
W
T
F
S
28
88°
55°
29
84°
59°
30
88°
57°
1
88°
55°
2
90°
61°
3
86°
59°
4
91°
61°
5
93°
59°
6
93°
64°
7
90°
64°
8
92°
65°
9
83°
62°
10
85°
62°
11
95°
63°
12
97°
66°
13
99°
67°
14
96°
68°
15
97°
66°
16
96°
67°
17
91°
66°
18
91°
65°
19
86°
61°
20
85°
63°
21
91°
59°
22
93°
63°
23
87°
62°
24
93°
63°
25
87°
63°
26
86°
62°
27
86°
61°
28
89°
62°
29
88°
58°
30
93°
63°
31
92°
63°
1
93°
62°
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 83° to 99°, with overnight lows between 58° and 68°. The average high for July is 91° with an average low of 63°. 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.
