S
M
T
W
T
F
S
26
97°
71°
27
98°
71°
28
99°
70°
29
96°
75°
30
98°
74°
31
100°
74°
1
93°
68°
2
93°
63°
3
95°
64°
4
98°
68°
5
99°
70°
6
100°
72°
7
99°
71°
8
80°
69°
9
96°
66°
10
97°
71°
11
96°
71°
12
99°
71°
13
100°
71°
14
99°
70°
15
99°
70°
16
102°
71°
17
104°
71°
18
105°
70°
19
104°
70°
20
106°
72°
21
95°
71°
22
102°
67°
23
101°
69°
24
95°
71°
25
101°
70°
26
93°
71°
27
97°
70°
28
94°
69°
29
95°
72°
30
94°
74°
31
96°
71°
1
94°
73°
2
93°
72°
3
91°
68°
4
91°
68°
5
90°
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 90° to 101°, with overnight lows between 68° and 74°. The average high for August is 94° with an average low of 71°. 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.
