San Juan County (Oljato-Monument Valley)
August
Weather in San Juan County, Utah for August 2026
Your guide to San Juan County weather in August - trends and predictions
Extreme Heat Warning - See hour by hour.
So far, August 2026 in San Juan County is slightly warmer than the historical average by 0.7 °F.
Expect cooler weather in the next days in San Juan County with the forecast suggesting a temperature of 32.9 °F, lower than the historical average.
In general, the average temperature in San Juan County at the beginning of August is 34.4 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 27 °F by the end of August.
With an average of 5 rainy days, San Juan County experiences minimal rainfall in August.
New! Chat with our AI weatherman - it’s amazing and free.
Official Weather Alert ⚠️
Temperatures
Rain 🌧️
More
26
Dry days
5
Rainy days
0
Snow days
31°/16°
Temperatures
27 km/h
Avg max wind
31 %
Avg humidity
San Juan County Weather August
Move between months or click on a day
Temperatures trend during August in San Juan County
See the weather trend as well as the moving average line
August weather in San Juan County day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 |  Partly cloudy | 34° /18° | 0 mm | 11 | |
| Aug. 2 |  Sunny | 35° /20° | 0.1 mm | 11 | |
| Aug. 3 | Sunny | 34° /19° | 0 mm | 11 | |
| Aug. 4 | Sunny | 34° /19° | 0 mm | 11 | |
| Aug. 5 | Partly cloudy | 35° /19° | 0 mm | 11 | |
| Aug. 6 | Sunny | 34° /19° | 0 mm | 11 | |
| Aug. 7 | Sunny | 35° /19° | 0 mm | 11 | |
| Aug. 8 | Partly cloudy | 35° /18° | 0 mm | 11 | |
| Aug. 9 | Sunny | 37° /25° | 0 mm | 9.1 | |
| Aug. 10 | Sunny | 37° /25° | 0.1 mm | 9.8 | |
| Aug. 11 | Sunny | 36° /24° | 0 mm | 9.6 | |
| Aug. 12 | Sunny | 36° /25° | 1.1 mm | 8 | |
| Aug. 13 | Sunny | 31° /20° | 17 mm | 8 | |
| Aug. 14 | Sunny | 28° /20° | 1.9 mm | 7 | |
| Aug. 15 | Sunny | 32° /24° | 0 mm | 8 | |
| Aug. 16 | Sunny | 32° /24° | 0.6 mm | 8 | |
| Aug. 17 | Sunny | 33° /27° | 0 mm | 8 | |
| Aug. 18 | Sunny | 33° /22° | 10 mm | 8 | |
| Aug. 19 | Sunny | 32° /22° | 0.6 mm | 8 | |
| Aug. 20 | Sunny | 32° /25° | 2.7 mm | 8 | |
| Aug. 21 | Sunny | 31° /24° | 1.1 mm | 8 | |
| Aug. 22 | Sunny | 31° /23° | 2.3 mm | 8 | |
| Aug. 23 |  Thundery outbreaks possible | 33° /19° | 0 mm | 7 | |
| Aug. 24 |  Light rain shower | 29° /17° | 14.4 mm | 6 | |
| Aug. 25 |  Moderate or heavy rain shower | 29° /17° | 8.4 mm | 6 | |
| Aug. 26 | Moderate or heavy rain shower | 26° /16° | 12.9 mm | 6 | |
| Aug. 27 | Thundery outbreaks possible | 25° /15° | 0 mm | 6 | |
| Aug. 28 |  Overcast | 26° /15° | 0 mm | 6 | |
| Aug. 29 | Overcast | 27° /17° | 0 mm | 6 | |
| Aug. 30 | Sunny | 27° /12° | 0 mm | 7 | |
| Aug. 31 | Sunny | 29° /15° | 0 mm | 7 | |
| Next | |||||
Important Notice
Our weather forecast for San Juan County in August 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.
Change Month
San Juan County in August - FAQ
What are the expected maximum and minimum temperatures in San Juan County during August?
Expect warm days with temperatures around 31°, cooling to mild conditions of 16° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in San Juan County during August?
In August, San Juan County can expect light to moderate rainfall, totaling 41.8 mm across approximately 5 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in San Juan County during August?
The average wind speed in San Juan County during August is 27 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in San Juan County
Explore the daily rainfall trends and prepare for San Juan Countys August weather 💧
Typically, San Juan County has 5 rainy days in August with a total of 41.8 mm of rainfall.
UV exposure in San Juan County during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
Top locations in San Juan County
Select a location for an accurate weather forecast
More Locations Quick links
More San Juan County weather pages
You are here
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.
Found a mistake?
We appreciate your attention to details. Tell us here.