S
M
T
W
T
F
S
30
85°
53°
31
77°
55°
1
77°
60°
2
81°
57°
3
82°
58°
4
83°
58°
5
84°
51°
6
81°
52°
7
76°
50°
8
75°
49°
9
75°
54°
10
79°
53°
11
78°
49°
12
73°
49°
13
75°
48°
14
74°
55°
15
77°
48°
16
79°
47°
17
72°
46°
18
70°
45°
19
70°
46°
20
71°
48°
21
69°
49°
22
69°
48°
23
71°
51°
24
73°
48°
25
74°
53°
26
76°
52°
27
76°
44°
28
69°
50°
29
68°
52°
30
74°
49°
1
68°
50°
2
70°
48°
3
65°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mifflin
Mifflin's September 2026 forecast shows daily high temperatures ranging from 65° to 85°, with overnight lows between 43° and 60°. The average high for September is 75° with an average low of 51°. 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 Mifflin. See also: October | November | December.
