S
M
T
W
T
F
S
30
77°
56°
31
72°
52°
1
71°
54°
2
71°
54°
3
72°
52°
4
72°
57°
5
79°
61°
6
79°
59°
7
78°
57°
8
78°
54°
9
73°
59°
10
79°
57°
11
81°
56°
12
74°
58°
13
78°
58°
14
78°
48°
15
77°
45°
16
66°
44°
17
66°
46°
18
68°
51°
19
67°
52°
20
68°
55°
21
73°
54°
22
69°
52°
23
74°
55°
24
75°
56°
25
75°
55°
26
76°
56°
27
75°
43°
28
75°
41°
29
65°
42°
30
61°
45°
1
59°
42°
2
61°
46°
3
61°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mapleton
Mapleton's September 2026 forecast shows daily high temperatures ranging from 59° to 81°, with overnight lows between 41° and 61°. The average high for September is 72° with an average low of 52°. 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 Mapleton. See also: October | November | December.