S
M
T
W
T
F
S
30
74°
50°
31
77°
51°
1
77°
53°
2
71°
50°
3
76°
52°
4
80°
52°
5
80°
51°
6
79°
52°
7
75°
48°
8
77°
50°
9
77°
50°
10
70°
47°
11
69°
44°
12
69°
46°
13
68°
43°
14
67°
42°
15
70°
43°
16
74°
45°
17
72°
49°
18
66°
49°
19
67°
48°
20
67°
49°
21
68°
40°
22
69°
47°
23
69°
48°
24
73°
44°
25
74°
48°
26
73°
40°
27
63°
39°
28
61°
38°
29
62°
38°
30
61°
45°
1
62°
44°
2
62°
40°
3
65°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Plumb
Plumb's September 2026 forecast shows daily high temperatures ranging from 61° to 80°, with overnight lows between 38° and 53°. The average high for September is 70° with an average low of 46°. 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 Plumb. See also: October | November | December.