| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | -2°F | 35°F | 15°F | 0.4" |
| February | 6°F | 43°F | 24°F | 0.3" |
| March | 17°F | 56°F | 36°F | 0.6" |
| April | 24°F | 63°F | 44°F | 0.7" |
| May | 32°F | 71°F | 52°F | 0.7" |
| June | 40°F | 83°F | 63°F | 0.3" |
| July | 47°F | 85°F | 66°F | 1.4" |
| August | 44°F | 82°F | 63°F | 1.1" |
| September | 36°F | 77°F | 56°F | 1.1" |
| October | 25°F | 66°F | 44°F | 0.8" |
| November | 12°F | 53°F | 31°F | 0.5" |
| December | 0°F | 38°F | 18°F | 0.5" |
| Index | San Luis | Colorado | National |
| Air quality index | 15 | 38 | 50 |
| Pollution index | 292,539 | 2,034,619 | 5,066,862 |
| Measurement | Total |
| Days measured | 358 |
| Days with good air quality | 334 |
| Days with moderate air quality | 24 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City, State | Population | Air Quality Index | National Avg. |
| San Acacio, CO | 68 | 15 | 70% |
| San Luis, CO | 678 | 15 | 70% |
| City, State | Population | Air Quality Index | National Avg. |
| Millsboro, PA | 678 | 36 | 28% |
| Farmersville, IL | 678 | 40 | 20% |
| Riceboro, GA | 678 | 39 | 22% |
| Interlaken, NY | 678 | 34 | 32% |
| Washington, OK | 677 | 48 | 4% |
| San Luis, CO | 678 | 15 | 70% |
Here are the best places to live in Colorado
These are the 10 most affordable cities in Colorado
10 Best cities in Colorado for employment
Top 10 cities in Colorado with the best education system