S
M
T
W
T
F
S
26
94°
75°
27
95°
73°
28
95°
76°
29
89°
74°
30
90°
69°
31
90°
75°
1
87°
70°
2
77°
67°
3
83°
66°
4
86°
66°
5
90°
70°
6
92°
71°
7
94°
72°
8
94°
71°
9
94°
70°
10
91°
72°
11
94°
71°
12
88°
68°
13
90°
71°
14
86°
66°
15
85°
64°
16
85°
64°
17
86°
65°
18
89°
67°
19
90°
66°
20
86°
65°
21
87°
68°
22
90°
70°
23
91°
70°
24
91°
69°
25
89°
66°
26
86°
63°
27
84°
62°
28
87°
64°
29
91°
69°
30
87°
69°
31
88°
68°
1
83°
68°
2
84°
67°
3
84°
64°
4
85°
64°
5
84°
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 77° to 94°, with overnight lows between 62° and 75°. The average high for August is 88° with an average low of 68°. 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.
