S
M
T
W
T
F
S
26
81°
56°
27
81°
57°
28
73°
63°
29
74°
56°
30
78°
54°
31
85°
52°
1
84°
65°
2
66°
59°
3
75°
52°
4
83°
55°
5
84°
62°
6
80°
62°
7
78°
61°
8
82°
63°
9
85°
64°
10
82°
62°
11
80°
59°
12
75°
57°
13
74°
57°
14
75°
56°
15
72°
61°
16
71°
55°
17
79°
60°
18
76°
60°
19
79°
59°
20
75°
57°
21
71°
56°
22
76°
60°
23
79°
60°
24
76°
59°
25
76°
59°
26
75°
60°
27
78°
59°
28
76°
58°
29
74°
58°
30
75°
58°
31
78°
57°
1
74°
55°
2
69°
53°
3
68°
54°
4
70°
55°
5
73°
57°
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 66° to 85°, with overnight lows between 52° and 64°. The average high for August is 76° 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.
