Natrona County (Casper)
September
Weather in Natrona County, Wyoming for September 2026
Your guide to Natrona County weather in September - trends and predictions
In general, the average temperature in Natrona County at the beginning of September is 25.1 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 26 °F by the end of September.
With an average of 2 rainy days, Natrona County experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
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28
Dry days
2
Rainy days
0
Snow days
25°/10°
Temperatures
25 km/h
Avg max wind
37 %
Avg humidity
Natrona County Weather September
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Temperatures trend during September in Natrona County
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September weather in Natrona County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 27° /10° | 0 mm | 7 | |
| Sept. 2 | Sunny | 28° /10° | 0 mm | 7 | |
| Sept. 3 | Sunny | 26° /11° | 0 mm | 7 | |
| Sept. 4 | Sunny | 27° /11° | 0 mm | 7 | |
| Sept. 5 |  Overcast | 19° /8° | 0 mm | 4 | |
| Sept. 6 | Sunny | 22° /4° | 0 mm | 6 | |
| Sept. 7 |  Thundery outbreaks possible | 27° /8° | 0 mm | 6 | |
| Sept. 8 |  Partly cloudy | 27° /11° | 0 mm | 7 | |
| Sept. 9 |  Cloudy | 29° /11° | 0 mm | 7 | |
| Sept. 10 | Sunny | 30° /12° | 0 mm | 8 | |
| Sept. 11 |  Patchy rain possible | 29° /12° | 0.1 mm | 7 | |
| Sept. 12 | Sunny | 26° /11° | 0 mm | 7 | |
| Sept. 13 | Sunny | 23° /10° | 0 mm | 6 | |
| Sept. 14 | Overcast | 25° /8° | 0 mm | 6 | |
| Sept. 15 | Partly cloudy | 27° /10° | 0 mm | 6 | |
| Sept. 16 |  Heavy rain at times | 23° /10° | 0.9 mm | 5 | |
| Sept. 17 |  Moderate or heavy rain shower | 17° /10° | 26.5 mm | 4 | |
| Sept. 18 | Sunny | 20° /8° | 3.8 mm | 5 | |
| Sept. 19 | Sunny | 24° /7° | 0 mm | 6 | |
| Sept. 20 | Sunny | 26° /7° | 0 mm | 7 | |
| Sept. 21 | Overcast | 20° /8° | 0 mm | 5 | |
| Sept. 22 | Sunny | 20° /5° | 0.6 mm | 5 | |
| Sept. 23 | Cloudy | 20° /5° | 0 mm | 5 | |
| Sept. 24 | Sunny | 23° /7° | 0 mm | 6 | |
| Sept. 25 | Sunny | 28° /7° | 0 mm | 8 | |
| Sept. 26 | Sunny | 28° /11° | 0 mm | 8 | |
| Sept. 27 | Sunny | 27° /9° | 0 mm | 7 | |
| Sept. 28 | Partly cloudy | 28° /10° | 0 mm | 8 | |
| Sept. 29 | Sunny | 28° /10° | 0 mm | 7 | |
| Sept. 30 | Sunny | 20° /6° | 0 mm | 6 | |
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Important Notice
Our weather forecast for Natrona 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 Natrona County forecast closer to your planned date for the most up-to-date weather information.
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Natrona County in September - FAQ
What are the expected maximum and minimum temperatures in Natrona County during September?
Enjoy moderate daytime temperatures of up to 25° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Natrona County during September?
Expect minimal rainfall in Natrona County during September, with a total of 11.2 mm over approximately 2 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Natrona County during September?
The average wind speed in Natrona County during September is 25 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Natrona County
Explore the daily rainfall trends and prepare for Natrona Countys September weather 💧
UV exposure in Natrona County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Natrona County?Get accurate weather forecasts for Natrona County, located at latitude 42.867 and longitude -106.313. Stay updated with localized weather information tailored for Natrona County.
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