S
M
T
W
T
F
S
30
73°
57°
31
78°
58°
1
80°
58°
2
80°
55°
3
78°
50°
4
79°
56°
5
78°
54°
6
77°
50°
7
71°
53°
8
69°
55°
9
72°
49°
10
71°
45°
11
69°
55°
12
75°
47°
13
76°
52°
14
75°
50°
15
68°
54°
16
74°
52°
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 68° to 80°, with overnight lows between 45° and 58°. The average high for September is 75° with an average low of 53°. 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.
