S
M
T
W
T
F
S
26
70°
61°
27
70°
58°
28
72°
60°
29
69°
60°
30
74°
59°
31
77°
58°
1
76°
60°
2
85°
60°
3
88°
58°
4
81°
59°
5
81°
59°
6
82°
58°
7
86°
59°
8
86°
60°
9
80°
57°
10
78°
58°
11
75°
57°
12
76°
59°
13
78°
58°
14
76°
59°
15
75°
57°
16
78°
58°
17
75°
57°
18
76°
58°
19
75°
56°
20
75°
56°
21
79°
58°
22
79°
57°
23
77°
59°
24
80°
59°
25
80°
58°
26
81°
60°
27
80°
60°
28
81°
59°
29
79°
59°
30
78°
60°
31
79°
60°
1
78°
57°
2
79°
58°
3
81°
58°
4
76°
59°
5
76°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Union City
Union City's August 2026 forecast shows daily high temperatures ranging from 75° to 88°, with overnight lows between 56° and 60°. The average high for August is 79° with an average low of 58°. 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 City. See also: September | October | November.
