S
M
T
W
T
F
S
26
64°
55°
27
64°
53°
28
65°
54°
29
65°
57°
30
68°
56°
31
66°
56°
1
68°
57°
2
65°
57°
3
66°
56°
4
66°
55°
5
68°
57°
6
69°
57°
7
69°
54°
8
65°
54°
9
64°
52°
10
64°
56°
11
66°
58°
12
69°
58°
13
69°
57°
14
68°
56°
15
70°
57°
16
69°
57°
17
67°
56°
18
66°
56°
19
68°
55°
20
68°
55°
21
67°
54°
22
65°
51°
23
65°
54°
24
65°
53°
25
64°
52°
26
64°
51°
27
65°
51°
28
64°
54°
29
64°
54°
30
63°
52°
31
63°
51°
1
64°
53°
2
63°
53°
3
63°
50°
4
64°
49°
5
62°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Thornley
Thornley's August 2026 forecast shows daily high temperatures ranging from 62° to 70°, with overnight lows between 49° and 58°. The average high for August is 66° with an average low of 54°. 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 Thornley. See also: September | October | November.