United StatesAverage weather for South Dakota in September
It's warm in September in South Dakota with an average temperature of 26°C. Temperatures this month range from a low of 22°C to a high of 31°C. At night, you can expect temperatures between 10°C and 17°C.
Start of September
The month of September starts in South Dakota with hot temps, averaging around 28°C during the day and nights around 15°C. There’s little chance of precipitation. The weather’s mostly sunny and dry.
With the temperature difference between day and night, it’s smart to wear layers.
Mid September
By mid-September, daytime temps drop to around 27°C, with nights around 13°C. Not much precipitation expected during this period. It’s mostly dry and sunny.
End of September
By the end of September, the average daytime temperature in South Dakota is around 24°C, while nighttime temps are about 12°C. A shower might pop up, but overall, the weather will be dry and sunny.
In September, there is an average of 44 mm of precipitation, spread over 6 days. The wind speed is around 4 Bft, mostly coming from the South.
South Dakota in September |
New York | ||
|---|---|---|---|
 Average temperature |
26°C | 27°C | |
 Max. temperature |
31°C | 31°C | |
| Min. temperature |
22°C | -5°C | |
 Total precipitation |
44 mm | 57 mm | |
| Rainy days |
6 days | 9 days | |
August
UV index
The UV index is a maximum of 5 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is September a good time to visit South Dakota?
Looking for great weather? September is a good time to be in South Dakota. The temperatures are nice, and there’s not too much rain.
Temperature records
With 40°C in 2023, South Dakota reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 8°C in 2020. The extreme nighttime temperatures ranged from a lowest recorded value of 3°C to a highest value of 23°C.
Check out the climate of South Dakota for all months and discover the best travel time
The climate in South Dakota is based on weather data from . Other places, like New York City, Miami or Los Angeles, might have different weather. You can check out all destinations in South Dakota to get the full picture of the climate.
Daily Temperature in September in South Dakota
This chart shows the average daily high and low temperatures in September for South Dakota, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in South Dakota
The chart below shows the average daily precipitation in September for South Dakota, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 6 days of precipitation in South Dakota.
Daily UV index in September in South Dakota
This chart shows the average daily UV index in September in South Dakota, 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.
Temperature in September in South Dakota over the years
This chart shows the average temperature in September in South Dakota, measured in degrees Celsius, over the past few years.
Total precipitation in September in South Dakota over the years
This chart shows the average precipitation in September in South Dakota, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in September for South Dakota
Click on any day in September to get detailed info about the usual weather on that day in South Dakota. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in South Dakota
Have you been to South Dakota in September?
Share your weather experience in September in South Dakota.
Average weather in South Dakota by month
Click on a month below to see detailed weather info for South Dakota. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of South Dakota for all months at once
