S
M
T
W
T
F
S
28
92°
68°
29
92°
64°
30
92°
68°
1
91°
69°
2
92°
69°
3
93°
68°
4
92°
69°
5
91°
69°
6
92°
67°
7
92°
69°
8
93°
65°
9
88°
65°
10
89°
66°
11
89°
66°
12
88°
65°
13
89°
66°
14
91°
70°
15
93°
70°
16
89°
69°
17
89°
70°
18
93°
70°
19
93°
69°
20
90°
69°
21
91°
68°
22
91°
68°
23
89°
69°
24
88°
69°
25
93°
68°
26
89°
69°
27
92°
65°
28
91°
64°
29
89°
65°
30
92°
68°
31
93°
69°
1
92°
68°
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 88° to 93°, with overnight lows between 64° and 70°. The average high for July is 91° with an average low of 68°. 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.
