S
M
T
W
T
F
S
30
81°
49°
31
82°
53°
1
83°
49°
2
81°
49°
3
81°
52°
4
82°
49°
5
81°
49°
6
80°
50°
7
79°
46°
8
80°
52°
9
81°
51°
10
80°
45°
11
78°
48°
12
79°
51°
13
78°
49°
14
80°
50°
15
Hist. Avg.
80°
49°
16
Hist. Avg.
80°
49°
17
Hist. Avg.
79°
49°
18
Hist. Avg.
79°
48°
19
Hist. Avg.
78°
48°
20
Hist. Avg.
78°
47°
21
Hist. Avg.
78°
47°
22
Hist. Avg.
77°
47°
23
Hist. Avg.
77°
46°
24
Hist. Avg.
76°
46°
25
Hist. Avg.
76°
45°
26
Hist. Avg.
76°
45°
27
Hist. Avg.
75°
44°
28
Hist. Avg.
75°
44°
29
Hist. Avg.
74°
44°
30
Hist. Avg.
74°
43°
1
Hist. Avg.
73°
43°
2
Hist. Avg.
73°
42°
3
Hist. Avg.
72°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Olathe
Olathe's September 2026 forecast shows daily high temperatures ranging from 78° to 83°, with overnight lows between 45° and 53°. The average high for September is 80° with an average low of 50°. 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 Olathe. See also: October | November | December.
