S
M
T
W
T
F
S
26
99°
73°
27
91°
70°
28
88°
68°
29
88°
64°
30
97°
70°
31
90°
64°
1
93°
64°
2
102°
66°
3
100°
66°
4
73°
52°
5
82°
52°
6
97°
61°
7
93°
64°
8
100°
64°
9
97°
70°
10
93°
68°
11
100°
72°
12
90°
64°
13
75°
63°
14
86°
61°
15
81°
57°
16
82°
59°
17
93°
59°
18
88°
63°
19
90°
61°
20
93°
63°
21
100°
64°
22
88°
63°
23
95°
64°
24
93°
68°
25
87°
59°
26
85°
59°
27
88°
64°
28
92°
66°
29
92°
66°
30
89°
63°
31
86°
62°
1
91°
60°
2
90°
61°
3
86°
61°
4
89°
62°
5
88°
61°
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 92°, with overnight lows between 59° and 66°. The average high for August is 89° with an average low of 62°. 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.
