The best times to visit South Dakota for ideal weather are
May 21st to June 24th
September 3rd to September 23rd
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
South Dakota Travel Guide
Weather in South Dakota
Average temperatures in South Dakota vary greatly and are seasonally temperate. The area is in the top 85 percent of tourist destinations for pleasant weather. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit South Dakota, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid-July where highs are regularly around 88.7°F (31.5°C) with temperatures rarely dropping below 62.6°F (17°C) at night.
South Dakota Temperatures (Fahrenheit)
South Dakota Temperatures (Celsius)
The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.
South Dakota Perceived Temperature (F)
South Dakota Perceived Temperature (C)
Average South Dakota Temperatures by Month
Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of precipitation in South Dakota are June, May, and then April. The lowest chance of rain or snow occurs around late October to early November. For example, on the week of October 29th there are only 0.9 days of precipitation on average. By contrast, it’s most likely to rain or snow in early-to-mid-June with an average of 3.1 days with significant precipitation the week of June 11th.
When can you find snow in South Dakota? Weather stations report a good amount of snow throughout the year likely to be deepest around March, especially close to late February and early March. Powder (new snow) is most often falls around October 1st. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.
Chance of Precipitation
The graph below shows the % chance of rainy and snowy days in South Dakota.
Snow on the Ground
The graph below shows the average snow on the ground in South Dakota (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
South Dakota has slightly low to average humidity compared to most tourist destinations. The least humid month is April (51.6% relative humidity), and the most humid month is December (66.2%).
Wind in South Dakota is usually stronger than usual. The windiest month is April, followed by May and January. April’s average wind speed of around 10.4 knots (12 MPH or 19.3 KPH) is considered “gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early May where average top sustained speeds reach 19.5 knots, which is considered a fresh breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in South Dakota.
The graph below shows wind speed (max and average) in knots.
Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots.
|Month||Avg. Wind||Meaning (Beaufort)||Avg. Maximum Sustained Wind||Meaning (Beufort)|
|Jan||9.7||a gentle breeze||18||a fresh breeze|
|Feb||9.2||a gentle breeze||16.9||a moderate breeze|
|Mar||9.7||a gentle breeze||17.8||a fresh breeze|
|Apr||10.4||a gentle breeze||18.8||a fresh breeze|
|May||9.8||a gentle breeze||18.4||a fresh breeze|
|Jun||8.4||a gentle breeze||17||a fresh breeze|
|Jul||7.6||a gentle breeze||15.5||a fresh breeze|
|Aug||7.4||a gentle breeze||15.1||a moderate breeze|
|Sep||8.2||a gentle breeze||15.8||a fresh breeze|
|Oct||9.2||a gentle breeze||16.9||a moderate breeze|
|Nov||9.1||a gentle breeze||16.9||a fresh breeze|
|Dec||8.8||a gentle breeze||16.2||a moderate breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to South Dakota?
As of 6/22/2017 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories.
Overall South Dakota Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderately cold. Highs range from 75.3°F (24.1°C) and 32.3°F (0.2°C) with warmer temperatures in the later months. Rain is somewhat common with 7 to 11 days of precipitation per month. Spring is slow/unreported for tourism, which makes it a good time for those looking for deals.
Summer (June through August)
The middle-year months have very comfortable weather with high temperatures that are quite warm. These months see moderate precipitation with 8 to 12 days of precipitation per month. June – August is slow/unreported season for tourism in South Dakota, so lodging and other accommodations may cost as much as usual.
Fall (September through November)
Fall daily highs range from 80.6°F (27°C) and 40.5°F (4.7°C), which will feel chilly given the humidity and wind. It rains or snows a fair amount: 4 to 8 days per month. Tourism is slow/unreported during these months due to the weather, so hotels may be normally priced.
Winter (December through February)
Weather is far too cold this time of year in South Dakota to be enjoyable for warm weather travelers. The average high during this season is between 35.6°F (2°C) and 29.4°F (-1.4°C). On average, it rains or snows a noticeable amount: 6 to 7 times per month. These times of year are slow/unreported with tourists.