S
M
T
W
T
F
S
26
92°
71°
27
86°
68°
28
77°
63°
29
80°
57°
30
86°
56°
31
77°
62°
1
68°
66°
2
75°
66°
3
79°
60°
4
84°
61°
5
76°
66°
6
77°
63°
7
85°
65°
8
81°
61°
9
76°
58°
10
82°
69°
11
79°
68°
12
83°
66°
13
75°
64°
14
79°
64°
15
78°
69°
16
85°
67°
17
78°
62°
18
79°
60°
19
76°
59°
20
78°
54°
21
77°
55°
22
78°
59°
23
74°
55°
24
75°
51°
25
80°
64°
26
83°
59°
27
80°
58°
28
80°
58°
29
80°
66°
30
82°
66°
31
81°
62°
1
75°
57°
2
73°
59°
3
75°
56°
4
75°
59°
5
76°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Union Grove
Union Grove's August 2026 forecast shows daily high temperatures ranging from 73° to 83°, with overnight lows between 56° and 66°. The average high for August is 78° with an average low of 60°. 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 Union Grove. See also: September | October | November.