S
M
T
W
T
F
S
26
91°
70°
27
89°
70°
28
90°
69°
29
92°
70°
30
92°
70°
31
90°
69°
1
88°
70°
2
87°
69°
3
89°
69°
4
90°
68°
5
92°
69°
6
91°
68°
7
89°
66°
8
92°
67°
9
89°
66°
10
88°
65°
11
90°
64°
12
92°
66°
13
93°
68°
14
92°
67°
15
92°
68°
16
91°
67°
17
92°
67°
18
91°
68°
19
90°
67°
20
90°
67°
21
87°
66°
22
86°
65°
23
88°
65°
24
92°
66°
25
92°
67°
26
91°
67°
27
91°
66°
28
90°
64°
29
89°
64°
30
88°
65°
31
87°
66°
1
86°
65°
2
86°
62°
3
85°
61°
4
85°
61°
5
86°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Thornton
Thornton's August 2026 forecast shows daily high temperatures ranging from 85° to 93°, with overnight lows between 61° and 70°. The average high for August is 90° 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 August weather will actually feel in Thornton. See also: September | October | November.
