Best Time to Visit San Juan County
Best time to visit San Juan County: May, June, July and September. Month-by-month temperature, rainfall and crowd guidance.
Best time to visit San Juan County
Go in May, June, July and September. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, February and December - expect the least comfortable mix of heat, cold or rain.
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 | 81° | 59° | 2,9 in | ★★★★☆ |
| September | 72° | 51° | 1,3 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).
How San Juan County compares with nearby places
Annual averages, and the difference against San Juan County.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Monument Valley | 46 mi | 57°F | +40°F warmer | 6 in |
| Canyonlands National Park | 49 mi | 58°F | +41°F warmer | 5 in |
| Dead Horse Point State Park | 59 mi | 55°F | +39°F warmer | 7 in |
| Moab | 67 mi | 60°F | +43°F warmer | 8 in |
| Grand County | 67 mi | 60°F | +43°F warmer | 8 in |
Summary
San Juan County is a county in Utah. San Juan County is a county in the United States. It has a population of about 14.500.
The best time to visit San Juan County is May, June, July and September. The climate is continental. January, February and December tend to be the least comfortable months. July is the warmest month with average highs near 83°F, while January is the coldest with lows near 19°F.
The closest major airport is Salt Lake City International Airport (SLC), about 248 mi away. Nearby highlights include Monument Valley, Canyonlands National Park, Dead Horse Point State Park and Arches National Park.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Things to do in San Juan County
Attractions, parks and landmarks in and around San Juan County.
Quick facts about San Juan County
| Type | County |
|---|---|
| State | Utah |
| Country | United States |
| Continent | North America |
| Coordinates | 37°37′30″N 109°47′60″W (37.625, -109.8) |
| Population | 14.500 |
| Best months | May, June, July and September |
| Climate | Continental |
Explore San Juan County
Every topic we hold for this place, and the same topic for the places around it.
Best Time to Visit for related places
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.
When is the best time to visit San Juan County?
May, June, July 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.
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. |
| 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 September 30, 2026 UTC. Live blocks refresh every 15 minutes; climate averages monthly.
