S
M
T
W
T
F
S
26
88°
71°
27
87°
71°
28
86°
70°
29
86°
71°
30
87°
71°
31
88°
66°
1
86°
66°
2
86°
68°
3
87°
71°
4
87°
71°
5
86°
69°
6
86°
71°
7
88°
71°
8
86°
70°
9
86°
69°
10
91°
70°
11
87°
70°
12
86°
71°
13
88°
69°
14
87°
70°
15
89°
69°
16
90°
70°
17
91°
69°
18
90°
70°
19
89°
65°
20
85°
64°
21
84°
64°
22
85°
65°
23
85°
63°
24
84°
63°
25
84°
64°
26
85°
64°
27
84°
63°
28
85°
64°
29
88°
64°
30
88°
65°
31
87°
67°
1
87°
68°
2
88°
63°
3
83°
62°
4
84°
63°
5
83°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Union
Union's August 2026 forecast shows daily high temperatures ranging from 83° to 91°, with overnight lows between 62° and 71°. The average high for August is 87° with an average low of 67°. 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. See also: September | October | November.
