S
M
T
W
T
F
S
26
98°
76°
27
98°
75°
28
97°
76°
29
98°
76°
30
98°
75°
31
97°
76°
1
98°
76°
2
97°
75°
3
97°
71°
4
95°
72°
5
98°
73°
6
97°
74°
7
99°
76°
8
100°
75°
9
99°
73°
10
97°
76°
11
99°
73°
12
98°
72°
13
94°
71°
14
93°
72°
15
96°
75°
16
96°
75°
17
97°
76°
18
96°
74°
19
97°
75°
20
98°
75°
21
98°
74°
22
97°
74°
23
97°
72°
24
96°
72°
25
94°
71°
26
93°
72°
27
94°
71°
28
91°
70°
29
91°
73°
30
95°
74°
31
94°
73°
1
92°
71°
2
91°
70°
3
93°
71°
4
95°
71°
5
95°
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 91° to 100°, with overnight lows between 70° and 76°. The average high for August is 96° with an average low of 73°. 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.
