United StatesThe weather in September in Yankton
It's warm in September in Yankton with an average temperature of 26°C. Temperatures this month range from a low of 23°C to a high of 29°C. At night, you can expect temperatures between 9°C and 18°C.
Looking for great weather? September is a good time to be in Yankton. The temperatures are nice, and there’s not too much rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Yankton, South Dakota. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 38°C in 2023, Yankton reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 8°C in 2018. The extreme nighttime temperatures ranged from a lowest recorded value of 3°C to a highest value of 25°C.
Rainfall amount
In September, there is an average of 58 mm of precipitation, spread over 9 days. The wind speed is around 4 Bft, mostly coming from the South.
Daily weather in September for Yankton
Click on any day in September to get detailed info about the usual weather on that day in Yankton. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Yankton | New York | |
|---|---|---|
| Average temperature | 26°C | 27°C |
| Max. temperature | 29°C | 31°C |
| Min. temperature | 9°C | -5°C |
| Total precipitation | 58 mm | 57 mm |
| Rainy days | 9 days | 9 days |
Start of September
The month of September starts in Yankton with hot temps, averaging around 27°C during the day and nights around 15°C.
Mid September
By mid-September, daytime temps stay steady at around 27°C, with nights around 14°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of September
By the end of September, the average daytime temperature in Yankton is around 25°C, while nighttime temps are about 12°C. There’s hardly any chance of precipitation. The weather will be mostly dry with plenty of sun.
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UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Check out the climate of Yankton for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in September in Yankton, South Dakota. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Yankton
Temperature in September in Yankton over the years
Precipitation charts
These charts show the average amount of precipitation in September in Yankton, South Dakota. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in Yankton
Total precipitation in September in Yankton over the years
Daily UV index in September in Yankton
This chart shows the average daily UV index in September in Yankton, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in September in Yankton
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Average weather in Yankton by month
Click on a month below to see detailed weather info for Yankton. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.