S
M
T
W
T
F
S
28
87°
64°
29
88°
65°
30
92°
66°
1
92°
67°
2
93°
69°
3
93°
68°
4
88°
68°
5
89°
66°
6
88°
66°
7
88°
67°
8
87°
67°
9
88°
66°
10
89°
66°
11
93°
69°
12
93°
69°
13
92°
70°
14
92°
69°
15
91°
70°
16
93°
68°
17
92°
70°
18
93°
68°
19
91°
68°
20
93°
69°
21
93°
68°
22
92°
68°
23
92°
67°
24
89°
67°
25
89°
68°
26
91°
65°
27
90°
65°
28
88°
66°
29
92°
69°
30
94°
69°
31
93°
66°
1
88°
65°
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 87° to 94°, with overnight lows between 64° and 70°. The average high for July is 91° with an average low of 67°. 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.
