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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Yankton, SD
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September
Average Temperature
High
25°
Feels 25
Low
12°
Feels 11
Average Precipitation
9 Days
Rain amount
67.4mm
Snow amount
0.1cm
Content continues below
Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
3
35°
4
34°
5
35°
6
33°
7
31°
8
31°
9
29°
10
27°
11
27°
12
27°
13
27°
14
26°
15
25°
16
26°
17
26°
18
19
20
21
22
23
24
25
26
27
28
29
30
Forecast
Thursday, September 3, 2026
Day
35°
Feels 38
Wind
27 km/h S
Gust
41 km/h
Humidity
42%
P.O.P
10%
Night
21°
Feels 21
Wind
31 km/h SE
Gust
47 km/h
Humidity
88%
P.O.P
0%
Historical Averages
Sep 3
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.