S
M
T
W
T
F
S
26
90°
75°
27
90°
69°
28
89°
68°
29
90°
71°
30
89°
70°
31
91°
73°
1
90°
76°
2
91°
72°
3
90°
71°
4
88°
69°
5
89°
70°
6
88°
70°
7
90°
69°
8
89°
69°
9
89°
72°
10
94°
73°
11
91°
73°
12
90°
74°
13
90°
73°
14
92°
72°
15
91°
72°
16
94°
70°
17
91°
69°
18
91°
71°
19
94°
68°
20
90°
67°
21
88°
67°
22
89°
69°
23
88°
68°
24
93°
67°
25
90°
68°
26
93°
71°
27
93°
70°
28
92°
70°
29
88°
69°
30
87°
70°
31
90°
70°
1
90°
69°
2
89°
70°
3
92°
70°
4
89°
69°
5
86°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Thompson Grove
Thompson Grove's August 2026 forecast shows daily high temperatures ranging from 86° to 94°, with overnight lows between 65° and 76°. The average high for August is 90° with an average low of 70°. 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 Thompson Grove. See also: September | October | November.