S
M
T
W
T
F
S
26
93°
73°
27
93°
72°
28
97°
77°
29
91°
73°
30
88°
68°
31
88°
64°
1
84°
69°
2
75°
67°
3
79°
66°
4
81°
66°
5
90°
67°
6
88°
69°
7
90°
68°
8
89°
69°
9
88°
70°
10
92°
70°
11
91°
71°
12
91°
68°
13
90°
70°
14
87°
66°
15
82°
62°
16
82°
62°
17
90°
70°
18
91°
69°
19
91°
71°
20
90°
70°
21
90°
69°
22
89°
70°
23
90°
70°
24
90°
69°
25
89°
69°
26
88°
68°
27
86°
69°
28
89°
68°
29
89°
67°
30
88°
68°
31
88°
68°
1
89°
67°
2
89°
67°
3
88°
66°
4
88°
67°
5
86°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Pomona
Pomona's August 2026 forecast shows daily high temperatures ranging from 75° to 92°, with overnight lows between 62° and 71°. The average high for August is 88° with an average low of 68°. 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 Pomona. See also: September | October | November.