Washington County (Zion National Park)
September
Weather in Washington County, Utah for September 2025
Your guide to Washington County weather in September - trends and predictions
The forecast for the first days of September 2025 in Washington County predicts temperatures to be around 32 °F, close to the historical average.
In general, the average temperature in Washington County at the beginning of September is 32 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 24.1 °F by the end of September.
With an average of 5 rainy days, Washington County experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
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25
Dry days
5
Rainy days
0
Snow days
21°/12°
Temperatures
19 km/h
Avg max wind
31 %
Avg humidity
Washington County Weather September
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Temperatures trend during September in Washington County
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September weather in Washington County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 34° /19° | 0 mm | 2.3 | |
| Sept. 2 | Sunny | 34° /20° | 0 mm | 0 | |
| Sept. 3 |  Patchy rain possible | 33° /20° | 1.3 mm | 6 | |
| Sept. 4 | Patchy rain possible | 32° /17° | 0.1 mm | 5 | |
| Sept. 5 | Sunny | 30° /16° | 0 mm | 6 | |
| Sept. 6 | Patchy rain possible | 31° /16° | 3.3 mm | 5 | |
| Sept. 7 | Sunny | 30° /15° | 0 mm | 6 | |
| Sept. 8 | Sunny | 31° /17° | 0 mm | 6 | |
| Sept. 9 |  Partly cloudy | 31° /18° | 0.1 mm | 6 | |
| Sept. 10 | Sunny | 31° /17° | 0 mm | 6 | |
| Sept. 11 | Sunny | 33° /18° | 0 mm | 7 | |
| Sept. 12 |  Overcast | 19° /10° | 0 mm | 4 | |
| Sept. 13 | Sunny | 20° /8° | 0 mm | 6 | |
| Sept. 14 | Patchy rain possible | 21° /10° | 0.1 mm | 5 | |
| Sept. 15 |  Moderate rain at times | 20° /12° | 4.2 mm | 5 | |
| Sept. 16 |  Heavy rain at times | 17° /10° | 2.4 mm | 4 | |
| Sept. 17 | Moderate rain at times | 12° /5° | 2.5 mm | 3 | |
| Sept. 18 | Overcast | 16° /5° | 0 mm | 4 | |
| Sept. 19 | Sunny | 17° /7° | 0 mm | 5 | |
| Sept. 20 | Patchy rain possible | 18° /8° | 0.8 mm | 4 | |
| Sept. 21 | Patchy rain possible | 17° /10° | 0.7 mm | 4 | |
| Sept. 22 | Patchy rain possible | 19° /8° | 0.7 mm | 4 | |
| Sept. 23 | Sunny | 21° /10° | 0 mm | 6 | |
| Sept. 24 | Sunny | 22° /9° | 0 mm | 6 | |
| Sept. 25 | Sunny | 23° /11° | 0 mm | 6 | |
| Sept. 26 | Sunny | 24° /12° | 0 mm | 6 | |
| Sept. 27 | Sunny | 25° /14° | 0 mm | 7 | |
| Sept. 28 | Sunny | 25° /14° | 0 mm | 7 | |
| Sept. 29 | Sunny | 24° /15° | 0 mm | 6 | |
| Sept. 30 | Sunny | 26° /19° | 0 mm | 7 | |
| Next | |||||
Important Notice
Our weather forecast for Washington 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 Washington County forecast closer to your planned date for the most up-to-date weather information.
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Washington County in September - FAQ
What are the expected maximum and minimum temperatures in Washington County during September?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Washington County during September?
Expect minimal rainfall in Washington County during September, with a total of 15.8 mm over approximately 5 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Washington County during September?
The average wind speed in Washington County during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Washington County
Explore the daily rainfall trends and prepare for Washington Countys September weather 💧
UV exposure in Washington County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Washington County?Get accurate weather forecasts for Washington County, located at latitude 37.298 and longitude -113.026. Stay updated with localized weather information tailored for Washington County.
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