South Dakota (Rapid City)
May
Weather in South Dakota for May 2027
Your guide to South Dakota weather in May - trends and predictions
In general, the average temperature in South Dakota at the beginning of May is 17.7 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 23.3 °C by the end of May.
The climate of South Dakota in May is notably wet, with an average of 14 rainy days, and a total of 94.8 mm of precipitation.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
17
Dry days
14
Rainy days
0
Snow days
20°/8°
Temperatures
26 km/h
Avg max wind
54 %
Avg humidity
South Dakota Weather May
Move between months or click on a day
What’s the Weather Like in South Dakota This May?
Discover the average temperatures and weather trends across South Dakota’s cities this May.
Temperatures trend during May in South Dakota
See the weather trend as well as the moving average line
May weather in South Dakota day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Patchy rain possible | 15° /3° | 0.2 mm | 6 | |
| May 2 |  Sunny | 20° /3° | 0 mm | 7 | |
| May 3 | Sunny | 21° /7° | 0.6 mm | 7 | |
| May 4 | Sunny | 20° /8° | 0.1 mm | 8 | |
| May 5 | Patchy rain possible | 16° /6° | 3.7 mm | 6 | |
| May 6 | Patchy rain possible | 14° /2° | 0.1 mm | 7 | |
| May 7 |  Overcast | 18° /4° | 0.6 mm | 7 | |
| May 8 | Overcast | 22° /7° | 0 mm | 7 | |
| May 9 |  Cloudy | 20° /11° | 0 mm | 7 | |
| May 10 | Sunny | 25° /9° | 0 mm | 9 | |
| May 11 | Sunny | 32° /12° | 0.1 mm | 9 | |
| May 12 | Sunny | 28° /14° | 0.1 mm | 9 | |
| May 13 | Cloudy | 28° /13° | 0.1 mm | 8 | |
| May 14 |  Heavy rain at times | 23° /12° | 6.1 mm | 7 | |
| May 15 | Patchy rain possible | 22° /9° | 0.1 mm | 7 | |
| May 16 | Patchy rain possible | 20° /8° | 4 mm | 7 | |
| May 17 | Sunny | 18° /6° | 0.6 mm | 7 | |
| May 18 |  Moderate or heavy rain shower | 10° /4° | 7.7 mm | 3 | |
| May 19 | Moderate or heavy rain shower | 11° /0° | 13.1 mm | 6 | |
| May 20 | Moderate rain at times | 16° /2° | 2 mm | 7 | |
| May 21 | Patchy rain possible | 17° /4° | 0.1 mm | 4 | |
| May 22 |  Partly cloudy | 18° /5° | 7.7 mm | 7 | |
| May 23 | Patchy rain possible | 18° /8° | 2.3 mm | 8 | |
| May 24 | Moderate rain at times | 19° /8° | 1.8 mm | 7 | |
| May 25 |  Moderate rain | 20° /10° | 17.7 mm | 7 | |
| May 26 | Moderate rain at times | 20° /11° | 7.7 mm | 7 | |
| May 27 |  Thundery outbreaks possible | 22° /12° | 0.5 mm | 7 | |
| May 28 | Thundery outbreaks possible | 22° /13° | 0.1 mm | 8 | |
| May 29 | Sunny | 26° /11° | 2.1 mm | 9 | |
| May 30 | Sunny | 28° /13° | 8.8 mm | 9 | |
| May 31 | Sunny | 25° /13° | 7.2 mm | 9 | |
| Next | |||||
Important Notice
Our weather forecast for South Dakota in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the South Dakota forecast closer to your planned date for the most up-to-date weather information.
Change Month
South Dakota in May - FAQ
What are the expected maximum and minimum temperatures in South Dakota during May?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in South Dakota during May?
Moderate rainfall is anticipated in South Dakota during May, with a total of 94.8 mm spread over approximately 14 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in South Dakota during May?
The average wind speed in South Dakota during May is 26 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in South Dakota
Explore the daily rainfall trends and prepare for South Dakotas May weather 💧
Typically, South Dakota has 14 rainy days in May with a total of 94.8 mm of rainfall.
UV exposure in South Dakota during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
Counties in South Dakota
Select a county for an accurate weather forecast
Top locations in South Dakota
Select a location for an accurate weather forecast
More Locations Quick links
More South Dakota weather pages
You are here
Where is South Dakota?Get accurate weather forecasts for South Dakota, located at latitude 44.081 and longitude -103.231. Stay updated with localized weather information tailored for South Dakota.
Found a mistake?
We appreciate your attention to details. Tell us here.