San Juan County Weather Forecast
San Juan County weather: 67°F, overcast. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Snow forecast for San Juan County
No snow is in the current forecast window for San Juan County.
0 of the next 16 nights are forecast to reach freezing.
Historically, average lows drop below freezing in January, February, March, November and December.
16-day forecast for San Juan County
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Fri, Aug 21 | ☁️ Overcast | 85° / 64° | 18% | 13 mph | 8 |
| Sat, Aug 22 | ☁️ Overcast | 82° / 67° | 11% | 12 mph | 8 |
| Sun, Aug 23 | ☁️ Overcast | 83° / 62° | 10% | 18 mph | 8 |
| Mon, Aug 24 | 🌦️ Drizzle | 83° / 63° | 12% · 0,1 in | 13 mph | 6 |
| Tue, Aug 25 | ☁️ Overcast | 85° / 66° | 13% | 16 mph | 8 |
| Wed, Aug 26 | 🌤️ Mainly clear | 85° / 65° | 5% | 15 mph | 8 |
| Thu, Aug 27 | ⛅ Partly cloudy | 85° / 67° | 3% | 18 mph | 8 |
| Fri, Aug 28 | ☁️ Overcast | 84° / 65° | 3% | 19 mph | 7 |
| Sat, Aug 29 | 🌦️ Light drizzle | 84° / 63° | 3% · 0,0 in | 16 mph | 8 |
| Sun, Aug 30 | 🌦️ Light drizzle | 83° / 64° | 9% · 0,0 in | 14 mph | 8 |
| Mon, Aug 31 | ☁️ Overcast | 82° / 63° | 15% | 21 mph | 7 |
| Tue, Sep 1 | ☁️ Overcast | 79° / 61° | 32% | 15 mph | 7 |
| Wed, Sep 2 | ☁️ Overcast | 78° / 59° | 23% | 14 mph | 7 |
| Thu, Sep 3 | ☁️ Overcast | 77° / 61° | 28% | 11 mph | 6 |
| Fri, Sep 4 | 🌦️ Light drizzle | 72° / 60° | 16% · 0,0 in | 13 mph | 6 |
| Sat, Sep 5 | ☀️ Clear sky | -- / -- | 28% | -- | — |
Climate in San Juan County month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 36° | 19° | 1,0 in | ★★☆☆☆ |
| February | 41° | 24° | 1,5 in | ★★☆☆☆ |
| March | 50° | 30° | 0,9 in | ★★★☆☆ |
| April | 56° | 34° | 1,3 in | ★★★★☆ |
| May | 66° | 42° | 1,2 in | ★★★★☆ |
| June | 80° | 56° | 1,4 in | ★★★★★ |
| July | 83° | 60° | 1,5 in | ★★★★★ |
| August | 80° | 58° | 2,2 in | ★★★★☆ |
| September | 71° | 51° | 1,7 in | ★★★★☆ |
| October | 60° | 41° | 4,1 in | ★★★☆☆ |
| November | 45° | 29° | 0,8 in | ★★★☆☆ |
| December | 41° | 25° | 0,6 in | ★★★☆☆ |
Climate type: Continental. Source: Open-Meteo archive (ERA5).
What to pack, what to skip
- Lightweight, light-coloured clothing and a refillable water bottle
- Sunglasses, a brimmed hat and SPF 30+
- If your dates are flexible, avoid January, February and December - historically the least comfortable months here.
See the San Juan County forecast by time range
San Juan County weather - more answers
Explore San Juan County
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Frequently asked questions
Where is San Juan County?
San Juan County is a county in Utah. Its coordinates are 37.625, -109.8. It lies in North America.
What is the weather like in San Juan County right now?
It is currently 67°F (19°C) with overcast. Humidity is 39% and wind is 7 mph.
When is the best time to visit San Juan County?
May, June, July, August and September offer the most comfortable conditions in San Juan County, which has a continental climate. January, February and December are usually the hardest months for outdoor plans.
What time zone is San Juan County in?
San Juan County observes America/Denver (UTC-06:00). The local time is 1:32 AM.
How many people live in San Juan County?
San Juan County has a population of approximately 14.500.
What is the nearest airport to San Juan County?
The closest airports are Salt Lake City International Airport (SLC), 248 mi away.
What are the top things to do in San Juan County?
Popular options include Monument Valley, Canyonlands National Park, Dead Horse Point State Park, Arches National Park, Mesa Verde National Park and Mesa Verde (UNESCO World Heritage Site).
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (us-counties) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 21, 2026 at 1:32 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
