S
M
T
W
T
F
S
30
76°
60°
31
78°
61°
1
79°
54°
2
76°
54°
3
76°
55°
4
75°
53°
5
75°
53°
6
76°
59°
7
80°
59°
8
75°
58°
9
80°
59°
10
80°
58°
11
77°
58°
12
79°
57°
13
79°
58°
14
80°
58°
15
80°
56°
16
79°
55°
17
76°
56°
18
71°
58°
19
78°
57°
20
78°
56°
21
77°
49°
22
76°
47°
23
73°
54°
24
70°
54°
25
69°
53°
26
Hist. Avg.
71°
50°
27
Hist. Avg.
71°
50°
28
Hist. Avg.
70°
50°
29
Hist. Avg.
70°
49°
30
Hist. Avg.
70°
49°
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
*Temporarily Unavailable
September Weather in Muncy
Muncy's September 2026 forecast shows daily high temperatures ranging from 69° to 80°, with overnight lows between 47° and 61°. The average high for September is 77° with an average low of 56°. 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 Muncy. See also: October | November | December.
