S
M
T
W
T
F
S
30
66°
49°
31
80°
54°
1
77°
53°
2
67°
52°
3
69°
52°
4
66°
48°
5
75°
47°
6
73°
49°
7
57°
53°
8
65°
53°
9
77°
48°
10
80°
55°
11
74°
49°
12
75°
50°
13
63°
50°
14
60°
48°
15
58°
50°
16
72°
46°
17
72°
46°
18
77°
49°
19
78°
51°
20
79°
51°
21
78°
51°
22
77°
49°
23
72°
48°
24
70°
49°
25
71°
51°
26
68°
48°
27
69°
48°
28
65°
47°
29
66°
46°
30
64°
48°
1
54°
32°
2
67°
40°
3
64°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Creston
Creston's September 2026 forecast shows daily high temperatures ranging from 54° to 79°, with overnight lows between 32° and 51°. The average high for September is 70° 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 Creston. See also: October | November | December.