S
M
T
W
T
F
S
26
69°
55°
27
68°
56°
28
71°
56°
29
70°
55°
30
69°
54°
31
68°
56°
1
68°
54°
2
69°
53°
3
68°
52°
4
70°
54°
5
71°
57°
6
72°
58°
7
72°
57°
8
69°
53°
9
68°
53°
10
67°
54°
11
67°
52°
12
68°
55°
13
68°
54°
14
67°
55°
15
67°
56°
16
68°
54°
17
69°
55°
18
71°
54°
19
70°
57°
20
72°
56°
21
70°
57°
22
71°
57°
23
71°
56°
24
70°
56°
25
70°
55°
26
69°
55°
27
69°
54°
28
68°
56°
29
68°
55°
30
69°
53°
31
66°
52°
1
67°
54°
2
66°
55°
3
67°
56°
4
68°
52°
5
66°
55°
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 72°, with overnight lows between 52° and 58°. The average high for August is 69° with an average low of 55°. 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.
