S
M
T
W
T
F
S
30
88°
43°
31
78°
49°
1
75°
49°
2
77°
53°
3
70°
54°
4
79°
46°
5
83°
44°
6
84°
42°
7
91°
44°
8
98°
45°
9
100°
52°
10
104°
59°
11
86°
54°
12
89°
47°
13
83°
44°
14
89°
44°
15
88°
43°
16
77°
56°
17
78°
49°
18
88°
45°
19
87°
45°
20
80°
52°
21
82°
52°
22
83°
51°
23
90°
52°
24
94°
57°
25
86°
53°
26
83°
50°
27
83°
54°
28
82°
53°
29
84°
55°
30
82°
53°
1
85°
56°
2
81°
51°
3
83°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Healdsburg
Healdsburg's September 2026 forecast shows daily high temperatures ranging from 80° to 94°, with overnight lows between 50° and 57°. The average high for September is 84° 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 Healdsburg. See also: October | November | December.
