S
M
T
W
T
F
S
30
81°
51°
31
70°
51°
1
70°
52°
2
70°
58°
3
68°
57°
4
71°
51°
5
76°
48°
6
78°
50°
7
86°
50°
8
92°
57°
9
102°
65°
10
94°
53°
11
87°
49°
12
82°
49°
13
85°
47°
14
85°
50°
15
81°
49°
16
82°
48°
17
82°
52°
18
83°
51°
19
85°
50°
20
84°
51°
21
83°
48°
22
78°
49°
23
81°
50°
24
80°
49°
25
80°
47°
26
78°
50°
27
84°
50°
28
85°
51°
29
85°
52°
30
84°
51°
1
85°
51°
2
85°
50°
3
84°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Graton
Graton's September 2026 forecast shows daily high temperatures ranging from 78° to 102°, with overnight lows between 47° and 65°. The average high for September is 84° 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 Graton. See also: October | November | December.
