S
M
T
W
T
F
S
28
93°
70°
29
94°
70°
30
91°
69°
1
92°
68°
2
90°
68°
3
91°
69°
4
92°
68°
5
89°
67°
6
91°
68°
7
90°
67°
8
87°
69°
9
86°
69°
10
90°
70°
11
90°
70°
12
89°
69°
13
87°
70°
14
86°
70°
15
87°
69°
16
89°
70°
17
88°
70°
18
89°
69°
19
89°
70°
20
90°
70°
21
89°
69°
22
90°
69°
23
91°
70°
24
92°
70°
25
91°
69°
26
91°
70°
27
89°
70°
28
90°
69°
29
92°
70°
30
92°
70°
31
90°
69°
1
88°
70°
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 86° to 94°, with overnight lows between 67° and 70°. The average high for July is 90° with an average low of 69°. 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.
