Pennington County (Rapid City)
September
Weather in Pennington County, South Dakota for September 2027
Your guide to Pennington County weather in September - trends and predictions
In general, the average temperature in Pennington County at the beginning of September is 29.3 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 26.9 °C by the end of September.
Pennington County experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 99.2 mm.
Is September a good time to visit Pennington County? check out the best time to travel to Pennington County page.
✨ Is September a good time to visit Pennington County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
23
Dry days
7
Rainy days
0
Snow days
27°/14°
Temperatures
24 km/h
Avg max wind
47 %
Avg humidity
Pennington County Weather September
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Temperatures trend during September in Pennington County
See the weather trend as well as the moving average line
September weather in Pennington County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Patchy rain possible | 28° /15° | 1.3 mm | 5 | |
| Sept. 2 |  Sunny | 33° /17° | 0 mm | 7.3 | |
| Sept. 3 |  Overcast | 31° /18° | 0 mm | 7 | |
| Sept. 4 | Patchy rain possible | 30° /16° | 0.5 mm | 6 | |
| Sept. 5 | Sunny | 26° /14° | 0.1 mm | 7 | |
| Sept. 6 | Sunny | 27° /12° | 0 mm | 6 | |
| Sept. 7 |  Light rain | 30° /14° | 3.2 mm | 6 | |
| Sept. 8 | Sunny | 30° /16° | 0 mm | 6.8 | |
| Sept. 9 | Patchy rain possible | 30° /16° | 1.4 mm | 6.7 | |
| Sept. 10 | Sunny | 33° /16° | 0 mm | 6.6 | |
| Sept. 11 |  Partly cloudy | 31° /17° | 0 mm | 6.5 | |
| Sept. 12 | Patchy rain possible | 28° /16° | 1.3 mm | 6 | |
| Sept. 13 |  Moderate rain at times | 24° /13° | 5.1 mm | 6 | |
| Sept. 14 |  Moderate rain | 24° /13° | 12.1 mm | 5 | |
| Sept. 15 | Partly cloudy | 27° /12° | 0 mm | 6.1 | |
| Sept. 16 | Partly cloudy | 27° /14° | 0 mm | 5 | |
| Sept. 17 |  Heavy rain | 22° /15° | 31.4 mm | 4 | |
| Sept. 18 | Heavy rain | 23° /13° | 30.6 mm | 5 | |
| Sept. 19 | Patchy rain possible | 22° /13° | 1.6 mm | 4 | |
| Sept. 20 | Light rain | 23° /12° | 7.3 mm | 5 | |
| Sept. 21 | Patchy rain possible | 20° /12° | 2.1 mm | 4 | |
| Sept. 22 | Sunny | 22° /11° | 0.3 mm | 5.5 | |
| Sept. 23 | Overcast | 23° /11° | 0.2 mm | 4 | |
| Sept. 24 | Sunny | 25° /13° | 0 mm | 5.3 | |
| Sept. 25 | Sunny | 27° /14° | 0 mm | 5.2 | |
| Sept. 26 | Sunny | 29° /16° | 0 mm | 5.1 | |
| Sept. 27 | Sunny | 23° /13° | 0.1 mm | 5 | |
| Sept. 28 | Sunny | 28° /15° | 0.4 mm | 4.9 | |
| Sept. 29 | Sunny | 30° /18° | 0.1 mm | 4.8 | |
| Sept. 30 | Sunny | 26° /13° | 0 mm | 4.8 | |
| Next | |||||
Important Notice
Our weather forecast for Pennington County in September 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.
Change Month
Pennington County in September - FAQ
What are the expected maximum and minimum temperatures in Pennington County during September?
Enjoy moderate daytime temperatures of up to 27° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Pennington County during September?
Moderate rainfall is anticipated in Pennington County during September, with a total of 99.2 mm spread over approximately 7 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Pennington County during September?
The average wind speed in Pennington County during September is 24 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Pennington County
Explore the daily rainfall trends and prepare for Pennington Countys September weather 💧
Typically, Pennington County has 7 rainy days in September with a total of 99.2 mm of rainfall.
UV exposure in Pennington County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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