S
M
T
W
T
F
S
26
76°
64°
27
78°
64°
28
78°
63°
29
74°
64°
30
73°
64°
31
76°
63°
1
79°
64°
2
79°
64°
3
81°
63°
4
80°
63°
5
79°
61°
6
80°
62°
7
78°
63°
8
77°
62°
9
76°
60°
10
79°
60°
11
77°
62°
12
77°
63°
13
80°
62°
14
79°
57°
15
74°
56°
16
73°
56°
17
75°
58°
18
73°
56°
19
75°
55°
20
74°
56°
21
73°
56°
22
76°
61°
23
77°
61°
24
78°
57°
25
78°
55°
26
76°
57°
27
77°
56°
28
71°
60°
29
76°
61°
30
77°
57°
31
77°
52°
1
74°
51°
2
69°
53°
3
69°
52°
4
70°
51°
5
69°
51°
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 69° to 81°, with overnight lows between 51° and 64°. The average high for August is 76° with an average low of 59°. 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.
