S
M
T
W
T
F
S
30
86°
67°
31
85°
62°
1
82°
61°
2
82°
60°
3
81°
59°
4
81°
59°
5
82°
62°
6
82°
65°
7
84°
61°
8
83°
59°
9
82°
63°
10
85°
65°
11
83°
64°
12
85°
65°
13
85°
63°
14
84°
64°
15
86°
63°
16
85°
62°
17
84°
63°
18
85°
62°
19
82°
61°
20
83°
59°
21
82°
54°
22
77°
52°
23
75°
55°
24
Hist. Avg.
79°
56°
25
Hist. Avg.
79°
56°
26
Hist. Avg.
78°
56°
27
Hist. Avg.
78°
55°
28
Hist. Avg.
78°
55°
29
Hist. Avg.
77°
54°
30
Hist. Avg.
77°
54°
1
Hist. Avg.
76°
54°
2
Hist. Avg.
76°
53°
3
Hist. Avg.
76°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Olmsted
Olmsted's September 2026 forecast shows daily high temperatures ranging from 75° to 86°, with overnight lows between 52° and 67°. The average high for September is 83° with an average low of 61°. 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 Olmsted. See also: October | November | December.