S
M
T
W
T
F
S
30
80°
60°
31
78°
60°
1
78°
66°
2
79°
67°
3
85°
66°
4
86°
67°
5
85°
64°
6
81°
59°
7
80°
61°
8
79°
59°
9
77°
57°
10
76°
57°
11
76°
58°
12
78°
57°
13
78°
63°
14
82°
62°
15
76°
56°
16
75°
59°
17
74°
58°
18
75°
61°
19
77°
54°
20
76°
56°
21
75°
55°
22
79°
53°
23
73°
53°
24
72°
52°
25
72°
56°
26
74°
57°
27
75°
58°
28
76°
58°
29
77°
50°
30
71°
53°
1
70°
58°
2
76°
57°
3
76°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Heatherton
Heatherton's September 2026 forecast shows daily high temperatures ranging from 70° to 86°, with overnight lows between 50° and 67°. The average high for September is 77° with an average low of 58°. 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 Heatherton. See also: October | November | December.
