S
M
T
W
T
F
S
30
64°
48°
31
63°
52°
1
66°
56°
2
66°
57°
3
62°
58°
4
65°
53°
5
65°
53°
6
64°
52°
7
72°
53°
8
76°
55°
9
83°
54°
10
74°
56°
11
60°
55°
12
65°
54°
13
64°
54°
14
67°
52°
15
64°
52°
16
66°
54°
17
69°
52°
18
70°
51°
19
69°
52°
20
68°
54°
21
71°
53°
22
74°
52°
23
71°
54°
24
71°
52°
25
69°
53°
26
72°
52°
27
73°
53°
28
70°
48°
29
67°
50°
30
68°
49°
1
72°
52°
2
66°
51°
3
68°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Tomales
Tomales's September 2026 forecast shows daily high temperatures ranging from 64° to 74°, with overnight lows between 48° and 54°. The average high for September is 69° with an average low of 52°. 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 Tomales. See also: October | November | December.