San Juan County (Oljato-Monument Valley)
September
Weather in San Juan County, Utah for September 2026
Your guide to San Juan County weather in September - trends and predictions
In general, the average temperature in San Juan County at the beginning of September is 28 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 25.4 °F by the end of September.
With an average of 4 rainy days, San Juan County experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
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26
Dry days
4
Rainy days
0
Snow days
27°/14°
Temperatures
22 km/h
Avg max wind
34 %
Avg humidity
San Juan County Weather September
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Temperatures trend during September in San Juan County
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September weather in San Juan County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Cloudy | 30° /18° | 0 mm | 7 | |
| Sept. 2 | Cloudy | 31° /18° | 0 mm | 7 | |
| Sept. 3 |  Thundery outbreaks possible | 29° /16° | 0 mm | 6 | |
| Sept. 4 |  Light rain shower | 28° /14° | 9.6 mm | 6 | |
| Sept. 5 |  Moderate or heavy rain shower | 25° /15° | 17.9 mm | 6 | |
| Sept. 6 | Thundery outbreaks possible | 25° /15° | 11.8 mm | 6 | |
| Sept. 7 |  Partly cloudy | 28° /13° | 0 mm | 7 | |
| Sept. 8 |  Sunny | 28° /13° | 0 mm | 7 | |
| Sept. 9 | Cloudy | 28° /16° | 0 mm | 7 | |
| Sept. 10 | Partly cloudy | 28° /15° | 0 mm | 7 | |
| Sept. 11 |  Overcast | 28° /16° | 0 mm | 7 | |
| Sept. 12 | Sunny | 26° /14° | 0 mm | 7 | |
| Sept. 13 | Sunny | 25° /13° | 0 mm | 7 | |
| Sept. 14 | Sunny | 27° /11° | 0 mm | 7 | |
| Sept. 15 | Overcast | 27° /13° | 0 mm | 7 | |
| Sept. 16 | Patchy rain possible | 26° /14° | 0.1 mm | 6 | |
| Sept. 17 | Sunny | 24° /12° | 0 mm | 7 | |
| Sept. 18 | Sunny | 24° /9° | 0 mm | 6 | |
| Sept. 19 | Sunny | 26° /11° | 0 mm | 7 | |
| Sept. 20 | Sunny | 26° /11° | 1.8 mm | 7 | |
| Sept. 21 | Moderate or heavy rain shower | 23° /11° | 3.2 mm | 6 | |
| Sept. 22 | Sunny | 22° /9° | 0 mm | 6 | |
| Sept. 23 | Sunny | 24° /11° | 0 mm | 6 | |
| Sept. 24 | Sunny | 24° /9° | 0 mm | 7 | |
| Sept. 25 | Sunny | 28° /13° | 0 mm | 7 | |
| Sept. 26 | Cloudy | 26° /12° | 12.9 mm | 6 | |
| Sept. 27 | Sunny | 25° /14° | 7.1 mm | 6 | |
| Sept. 28 | Partly cloudy | 23° /13° | 6.1 mm | 6 | |
| Sept. 29 | Cloudy | 26° /13° | 0 mm | 6 | |
| Sept. 30 | Sunny | 26° /12° | 0 mm | 7 | |
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Important Notice
Our weather forecast for San Juan 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 San Juan County forecast closer to your planned date for the most up-to-date weather information.
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San Juan County in September - FAQ
What are the expected maximum and minimum temperatures in San Juan 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 San Juan County during September?
In September, San Juan County can expect light to moderate rainfall, totaling 45.8 mm across approximately 4 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in San Juan County during September?
The average wind speed in San Juan County during September is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in San Juan County
Explore the daily rainfall trends and prepare for San Juan Countys September weather 💧
UV exposure in San Juan County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is San Juan County?Get accurate weather forecasts for San Juan County, located at latitude 37.031 and longitude -110.251. Stay updated with localized weather information tailored for San Juan County.
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