S
M
T
W
T
F
S
30
81°
68°
31
78°
70°
1
80°
70°
2
81°
69°
3
81°
69°
4
80°
65°
5
77°
64°
6
75°
65°
7
74°
63°
8
73°
64°
9
73°
64°
10
75°
66°
11
75°
67°
12
77°
68°
13
79°
68°
14
79°
66°
15
77°
65°
16
76°
68°
17
77°
69°
18
78°
69°
19
79°
68°
20
80°
69°
21
80°
69°
22
78°
68°
23
75°
65°
24
73°
63°
25
74°
62°
26
72°
64°
27
72°
66°
28
75°
65°
29
76°
64°
30
Hist. Avg.
76°
64°
1
Hist. Avg.
76°
64°
2
Hist. Avg.
76°
64°
3
Hist. Avg.
76°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Petco Park
Petco Park's September 2026 forecast shows daily high temperatures ranging from 72° to 81°, with overnight lows between 62° and 70°. The average high for September 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 September weather will actually feel in Petco Park. See also: October | November | December.
