S
M
T
W
T
F
S
26
88°
69°
27
86°
67°
28
87°
69°
29
89°
71°
30
89°
72°
31
84°
72°
1
85°
71°
2
85°
72°
3
86°
72°
4
85°
71°
5
87°
67°
6
86°
68°
7
87°
70°
8
88°
71°
9
85°
72°
10
85°
72°
11
86°
69°
12
85°
69°
13
85°
68°
14
86°
69°
15
87°
71°
16
88°
72°
17
89°
72°
18
89°
71°
19
88°
71°
20
86°
70°
21
87°
65°
22
84°
65°
23
83°
67°
24
84°
66°
25
85°
68°
26
86°
69°
27
87°
70°
28
89°
70°
29
89°
69°
30
88°
69°
31
89°
70°
1
89°
69°
2
86°
69°
3
86°
68°
4
88°
69°
5
87°
70°
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 89°, with overnight lows between 65° and 72°. The average high for August is 87° 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 Union. See also: September | October | November.
