S
M
T
W
T
F
S
30
76°
57°
31
78°
54°
1
72°
52°
2
69°
51°
3
69°
48°
4
70°
49°
5
71°
53°
6
76°
56°
7
77°
55°
8
77°
55°
9
76°
54°
10
75°
55°
11
76°
54°
12
76°
54°
13
75°
55°
14
75°
43°
15
65°
44°
16
66°
43°
17
68°
45°
18
69°
43°
19
65°
46°
20
64°
48°
21
72°
50°
22
73°
49°
23
72°
40°
24
66°
38°
25
63°
43°
26
69°
48°
27
70°
49°
28
69°
43°
29
65°
37°
30
59°
38°
1
59°
46°
2
64°
45°
3
65°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lowville
Lowville's September 2026 forecast shows daily high temperatures ranging from 59° to 78°, with overnight lows between 37° and 57°. The average high for September is 70° with an average low of 48°. 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 Lowville. See also: October | November | December.