S
M
T
W
T
F
S
26
86°
62°
27
86°
61°
28
89°
62°
29
88°
58°
30
93°
63°
31
92°
63°
1
93°
62°
2
87°
59°
3
92°
61°
4
91°
63°
5
92°
62°
6
93°
63°
7
91°
60°
8
86°
58°
9
91°
60°
10
92°
59°
11
92°
62°
12
91°
62°
13
92°
61°
14
91°
61°
15
91°
59°
16
86°
60°
17
85°
57°
18
85°
56°
19
86°
57°
20
89°
57°
21
88°
58°
22
91°
57°
23
93°
56°
24
85°
58°
25
83°
55°
26
88°
54°
27
86°
55°
28
85°
58°
29
89°
53°
30
83°
56°
31
89°
52°
1
85°
56°
2
89°
57°
3
90°
55°
4
89°
51°
5
86°
50°
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 83° to 93°, with overnight lows between 50° and 63°. The average high for August is 89° with an average low of 58°. 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.
