S
M
T
W
T
F
S
30
87°
58°
31
88°
60°
1
90°
57°
2
83°
56°
3
80°
56°
4
82°
57°
5
84°
59°
6
83°
57°
7
81°
52°
8
77°
54°
9
76°
54°
10
78°
56°
11
80°
53°
12
86°
53°
13
77°
61°
14
85°
64°
15
88°
56°
16
85°
51°
17
76°
52°
18
77°
51°
19
82°
50°
20
82°
54°
21
81°
60°
22
82°
58°
23
77°
56°
24
71°
55°
25
75°
57°
26
77°
56°
27
77°
56°
28
76°
58°
29
76°
57°
30
70°
51°
1
69°
46°
2
68°
45°
3
68°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Millcreek
Millcreek's September 2026 forecast shows daily high temperatures ranging from 68° to 90°, with overnight lows between 45° and 64°. The average high for September is 79° with an average low of 55°. 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 Millcreek. See also: October | November | December.
