S
M
T
W
T
F
S
26
92°
70°
27
93°
71°
28
94°
73°
29
96°
72°
30
94°
71°
31
95°
71°
1
94°
72°
2
94°
73°
3
98°
76°
4
99°
73°
5
98°
75°
6
99°
70°
7
95°
70°
8
94°
71°
9
94°
71°
10
95°
72°
11
95°
71°
12
96°
70°
13
95°
73°
14
97°
72°
15
98°
72°
16
98°
73°
17
99°
74°
18
98°
72°
19
94°
74°
20
97°
75°
21
99°
74°
22
98°
74°
23
98°
73°
24
97°
74°
25
98°
74°
26
98°
73°
27
97°
74°
28
97°
75°
29
95°
74°
30
96°
73°
31
96°
72°
1
95°
71°
2
95°
72°
3
94°
73°
4
95°
72°
5
95°
71°
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 92° to 99°, with overnight lows between 70° and 76°. The average high for August is 96° with an average low of 73°. 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.
