S
M
T
W
T
F
S
30
82°
71°
31
82°
79°
1
86°
78°
2
83°
75°
3
87°
76°
4
85°
75°
5
82°
74°
6
82°
73°
7
79°
70°
8
80°
70°
9
84°
73°
10
88°
74°
11
83°
70°
12
81°
72°
13
84°
72°
14
88°
70°
15
87°
71°
16
88°
68°
17
81°
66°
18
83°
66°
19
77°
59°
20
75°
62°
21
77°
61°
22
76°
60°
23
76°
65°
24
76°
64°
25
74°
61°
26
74°
60°
27
78°
63°
28
82°
63°
29
76°
61°
30
79°
63°
1
78°
62°
2
77°
61°
3
78°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Frenchtown-Rumbly
Frenchtown-Rumbly's September 2026 forecast shows daily high temperatures ranging from 74° to 88°, with overnight lows between 59° and 74°. The average high for September is 80° with an average low of 65°. 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 Frenchtown-Rumbly. See also: October | November | December.