S
M
T
W
T
F
S
30
88°
67°
31
88°
67°
1
87°
66°
2
88°
66°
3
87°
65°
4
87°
67°
5
88°
66°
6
88°
66°
7
87°
65°
8
88°
66°
9
88°
66°
10
89°
65°
11
88°
66°
12
87°
65°
13
88°
66°
14
85°
60°
15
78°
61°
16
81°
62°
17
82°
58°
18
86°
53°
19
75°
52°
20
75°
54°
21
80°
53°
22
82°
53°
23
83°
58°
24
81°
55°
25
77°
58°
26
82°
58°
27
77°
57°
28
80°
57°
29
74°
49°
30
73°
49°
1
76°
53°
2
80°
51°
3
80°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Olmstead
Olmstead's September 2026 forecast shows daily high temperatures ranging from 73° to 89°, with overnight lows between 49° and 67°. The average high for September is 83° with an average low of 60°. 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 Olmstead. See also: October | November | December.
