S
M
T
W
T
F
S
26
77°
60°
27
78°
63°
28
77°
63°
29
77°
62°
30
78°
64°
31
80°
63°
1
82°
63°
2
82°
62°
3
82°
63°
4
82°
63°
5
79°
61°
6
78°
62°
7
80°
57°
8
78°
56°
9
78°
57°
10
80°
60°
11
82°
61°
12
83°
62°
13
83°
63°
14
82°
62°
15
81°
62°
16
78°
61°
17
78°
61°
18
77°
60°
19
82°
60°
20
76°
61°
21
77°
56°
22
78°
59°
23
78°
57°
24
79°
56°
25
81°
59°
26
80°
60°
27
81°
61°
28
80°
60°
29
80°
61°
30
79°
60°
31
79°
54°
1
76°
54°
2
73°
53°
3
76°
54°
4
78°
58°
5
78°
58°
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 73° to 83°, with overnight lows between 53° and 64°. The average high for August is 79° 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. See also: September | October | November.
