S
M
T
W
T
F
S
26
72°
63°
27
74°
64°
28
75°
65°
29
76°
67°
30
78°
68°
31
78°
68°
1
77°
69°
2
79°
69°
3
79°
68°
4
78°
68°
5
78°
67°
6
77°
67°
7
76°
68°
8
78°
69°
9
79°
69°
10
79°
68°
11
78°
69°
12
79°
69°
13
78°
66°
14
76°
68°
15
79°
68°
16
79°
67°
17
78°
65°
18
77°
66°
19
76°
65°
20
77°
67°
21
79°
69°
22
80°
70°
23
81°
70°
24
81°
69°
25
80°
70°
26
81°
70°
27
81°
69°
28
80°
68°
29
81°
67°
30
80°
66°
31
78°
68°
1
80°
68°
2
81°
67°
3
81°
67°
4
80°
63°
5
77°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Chula Vista
Chula Vista's August 2026 forecast shows daily high temperatures ranging from 72° to 81°, with overnight lows between 63° and 70°. The average high for August is 78° with an average low of 67°. 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 Chula Vista. See also: September | October | November.
