S
M
T
W
T
F
S
30
80°
68°
31
81°
69°
1
82°
69°
2
81°
68°
3
81°
70°
4
80°
69°
5
81°
67°
6
81°
61°
7
76°
59°
8
73°
62°
9
74°
62°
10
77°
65°
11
79°
64°
12
80°
66°
13
79°
68°
14
81°
67°
15
81°
65°
16
80°
64°
17
79°
66°
18
78°
67°
19
80°
66°
20
80°
62°
21
78°
66°
22
75°
65°
23
71°
61°
24
72°
65°
25
73°
64°
26
75°
62°
27
74°
62°
28
74°
64°
29
75°
59°
30
72°
64°
1
72°
66°
2
80°
64°
3
74°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Chula Vista
Chula Vista's September 2026 forecast shows daily high temperatures ranging from 71° to 82°, with overnight lows between 59° and 70°. The average high for September is 77° with an average low of 65°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Chula Vista. See also: October | November | December.
