S
M
T
W
T
F
S
30
79°
52°
31
73°
50°
1
72°
49°
2
72°
50°
3
73°
56°
4
73°
51°
5
72°
49°
6
71°
48°
7
72°
52°
8
73°
53°
9
76°
54°
10
77°
55°
11
76°
54°
12
70°
52°
13
69°
55°
14
69°
46°
15
67°
46°
16
Hist. Avg.
71°
48°
17
Hist. Avg.
71°
47°
18
Hist. Avg.
70°
47°
19
Hist. Avg.
70°
46°
20
Hist. Avg.
69°
46°
21
Hist. Avg.
69°
46°
22
Hist. Avg.
68°
45°
23
Hist. Avg.
68°
45°
24
Hist. Avg.
68°
44°
25
Hist. Avg.
67°
44°
26
Hist. Avg.
67°
43°
27
Hist. Avg.
66°
43°
28
Hist. Avg.
66°
42°
29
Hist. Avg.
66°
42°
30
Hist. Avg.
65°
42°
1
Hist. Avg.
65°
41°
2
Hist. Avg.
64°
41°
3
Hist. Avg.
64°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Watsonville
Watsonville's September 2026 forecast shows daily high temperatures ranging from 67° to 79°, with overnight lows between 46° and 56°. The average high for September is 73° with an average low of 51°. 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 Watsonville. See also: October | November | December.
