S
M
T
W
T
F
S
26
79°
69°
27
79°
69°
28
78°
68°
29
78°
69°
30
79°
70°
31
79°
69°
1
78°
68°
2
79°
69°
3
79°
69°
4
78°
68°
5
78°
69°
6
77°
69°
7
78°
68°
8
79°
69°
9
79°
69°
10
78°
68°
11
78°
66°
12
74°
63°
13
73°
63°
14
74°
65°
15
77°
68°
16
77°
69°
17
77°
63°
18
76°
63°
19
75°
68°
20
76°
69°
21
79°
69°
22
78°
68°
23
79°
66°
24
79°
64°
25
76°
63°
26
75°
62°
27
75°
63°
28
76°
62°
29
75°
63°
30
75°
62°
31
76°
62°
1
75°
61°
2
74°
61°
3
74°
62°
4
75°
62°
5
74°
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 73° to 79°, with overnight lows between 61° and 70°. The average high for August is 77° with an average low of 66°. 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.
