S
M
T
W
T
F
S
30
93°
64°
31
98°
69°
1
98°
69°
2
98°
68°
3
104°
71°
4
100°
71°
5
101°
71°
6
97°
70°
7
89°
63°
8
94°
69°
9
97°
73°
10
92°
71°
11
93°
71°
12
90°
67°
13
95°
64°
14
90°
67°
15
100°
67°
16
97°
72°
17
98°
71°
18
99°
69°
19
98°
72°
20
98°
70°
21
89°
65°
22
80°
64°
23
77°
59°
24
76°
57°
25
76°
56°
26
78°
54°
27
76°
55°
28
79°
57°
29
80°
58°
30
79°
59°
1
76°
56°
2
74°
51°
3
76°
58°
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 74° to 98°, with overnight lows between 51° and 72°. The average high for September is 81° with an average low of 59°. 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.
