S
M
T
W
T
F
S
30
64°
50°
31
65°
51°
1
66°
52°
2
65°
52°
3
64°
51°
4
66°
52°
5
65°
50°
6
63°
50°
7
61°
49°
8
62°
50°
9
61°
47°
10
61°
49°
11
62°
47°
12
61°
50°
13
60°
47°
14
61°
47°
15
60°
46°
16
60°
49°
17
61°
46°
18
59°
48°
19
61°
47°
20
60°
46°
21
59°
49°
22
59°
46°
23
60°
45°
24
58°
44°
25
58°
47°
26
59°
49°
27
58°
47°
28
58°
45°
29
59°
44°
30
58°
44°
1
57°
45°
2
59°
48°
3
58°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Johnshaven
Johnshaven's September 2026 forecast shows daily high temperatures ranging from 57° to 66°, with overnight lows between 43° and 52°. The average high for September is 61° 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 Johnshaven. See also: October | November | December.
