S
M
T
W
T
F
S
30
77°
57°
31
78°
56°
1
77°
51°
2
71°
49°
3
70°
48°
4
70°
48°
5
71°
49°
6
75°
56°
7
78°
55°
8
77°
56°
9
76°
55°
10
77°
55°
11
77°
54°
12
78°
55°
13
79°
56°
14
79°
45°
15
67°
46°
16
65°
44°
17
68°
47°
18
77°
51°
19
77°
51°
20
78°
50°
21
74°
43°
22
71°
41°
23
64°
42°
24
64°
49°
25
68°
49°
26
67°
50°
27
71°
49°
28
72°
49°
29
73°
48°
30
73°
48°
1
72°
46°
2
71°
41°
3
68°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Tunkhannock
Tunkhannock's September 2026 forecast shows daily high temperatures ranging from 64° to 79°, with overnight lows between 39° and 57°. The average high for September is 73° with an average low of 49°. 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 Tunkhannock. See also: October | November | December.