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
77°
51°
21
77°
54°
22
82°
54°
23
93°
45°
24
93°
46°
25
85°
48°
26
79°
41°
27
78°
49°
28
84°
40°
29
98°
43°
30
96°
47°
1
94°
42°
2
94°
45°
3
103°
48°
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 ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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.
