S
M
T
W
T
F
S
30
73°
49°
31
72°
48°
1
72°
50°
2
73°
50°
3
71°
51°
4
70°
50°
5
73°
49°
6
72°
48°
7
70°
48°
8
69°
46°
9
69°
49°
10
70°
49°
11
68°
46°
12
68°
46°
13
70°
47°
14
71°
52°
15
71°
51°
16
73°
51°
17
73°
45°
18
69°
44°
19
71°
48°
20
72°
46°
21
66°
43°
22
67°
47°
23
68°
48°
24
69°
49°
25
70°
47°
26
69°
40°
27
68°
40°
28
62°
41°
29
61°
41°
30
61°
39°
1
Hist. Avg.
69°
48°
2
Hist. Avg.
69°
48°
3
Hist. Avg.
68°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Jermyn
Jermyn's September 2026 forecast shows daily high temperatures ranging from 61° to 73°, with overnight lows between 39° and 52°. The average high for September is 69° with an average low of 47°. 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 Jermyn. See also: October | November | December.
