Pennington County (Rapid City)
May
Weather in Pennington County, South Dakota for May 2026
Your guide to Pennington County weather in May - trends and predictions
In general, the average temperature in Pennington County at the beginning of May is 19.4 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 18.3 °F by the end of May.
The climate of Pennington County in May is notably wet, with an average of 12 rainy days, and a total of 119.4 mm of precipitation.
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Temperatures
Rain 🌧️
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19
Dry days
12
Rainy days
0
Snow days
19°/9°
Temperatures
24 km/h
Avg max wind
61 %
Avg humidity
Pennington County Weather May
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Temperatures trend during May in Pennington County
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May weather in Pennington County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Patchy rain possible | 14° /5° | 0.3 mm | 3 | |
| May 2 |  Sunny | 16° /3° | 0 mm | 5 | |
| May 3 | Sunny | 23° /6° | 0 mm | 6 | |
| May 4 | Sunny | 26° /10° | 0 mm | 7 | |
| May 5 | Patchy rain possible | 23° /10° | 7.3 mm | 5 | |
| May 6 | Patchy rain possible | 15° /6° | 0.1 mm | 4 | |
| May 7 |  Overcast | 19° /6° | 0 mm | 4 | |
| May 8 | Overcast | 24° /9° | 0 mm | 5 | |
| May 9 |  Cloudy | 26° /15° | 0 mm | 6 | |
| May 10 | Sunny | 30° /12° | 0 mm | 8 | |
| May 11 | Sunny | 33° /17° | 0 mm | 8 | |
| May 12 | Sunny | 33° /18° | 0 mm | 8 | |
| May 13 | Cloudy | 26° /18° | 0.2 mm | 6 | |
| May 14 |  Heavy rain at times | 19° /11° | 12.1 mm | 4 | |
| May 15 | Patchy rain possible | 18° /9° | 0.2 mm | 4 | |
| May 16 | Patchy rain possible | 14° /8° | 4.4 mm | 3 | |
| May 17 | Sunny | 19° /5° | 0 mm | 5 | |
| May 18 |  Moderate or heavy rain shower | 13° /7° | 6.9 mm | 3 | |
| May 19 | Moderate or heavy rain shower | 7° /1° | 25.9 mm | 2 | |
| May 20 | Moderate rain at times | 13° /2° | 2.6 mm | 3 | |
| May 21 | Patchy rain possible | 17° /4° | 0.1 mm | 4 | |
| May 22 |  Partly cloudy | 18° /5° | 0.1 mm | 5 | |
| May 23 | Patchy rain possible | 15° /8° | 3.8 mm | 4 | |
| May 24 | Moderate rain at times | 11° /7° | 3.7 mm | 3 | |
| May 25 |  Moderate rain | 10° /8° | 35.3 mm | 3 | |
| May 26 | Moderate rain at times | 10° /8° | 15.4 mm | 3 | |
| May 27 |  Thundery outbreaks possible | 15° /8° | 1 mm | 4 | |
| May 28 | Thundery outbreaks possible | 18° /10° | 0 mm | 4 | |
| May 29 | Sunny | 21° /9° | 0 mm | 6 | |
| May 30 | Sunny | 27° /12° | 0 mm | 7 | |
| May 31 | Sunny | 27° /15° | 0 mm | 7 | |
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Important Notice
Our weather forecast for Pennington County 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 Pennington County forecast closer to your planned date for the most up-to-date weather information.
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Pennington County in May - FAQ
What are the expected maximum and minimum temperatures in Pennington County during May?
Enjoy moderate daytime temperatures of up to 19° and cooler nights around 9°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Pennington County during May?
Significant rainfall exceeding 119.4 mm is expected in Pennington County during May, occurring over more than 12 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Pennington County during May?
The average wind speed in Pennington County during May is 24 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Pennington County
Explore the daily rainfall trends and prepare for Pennington Countys May weather 💧
UV exposure in Pennington County during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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Where is Pennington County?Get accurate weather forecasts for Pennington County, located at latitude 44.081 and longitude -103.231. Stay updated with localized weather information tailored for Pennington County.
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