| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 16°F | 45°F | 30°F | 3.2" |
| February | 18°F | 46°F | 31°F | 2.6" |
| March | 25°F | 56°F | 40°F | 2.1" |
| April | 31°F | 60°F | 45°F | 2.9" |
| May | 39°F | 68°F | 53°F | 4.9" |
| June | 49°F | 82°F | 66°F | 2.8" |
| July | 54°F | 84°F | 69°F | 5.5" |
| August | 52°F | 82°F | 66°F | 4.4" |
| September | 45°F | 76°F | 60°F | 5.5" |
| October | 34°F | 65°F | 48°F | 2.0" |
| November | 24°F | 55°F | 39°F | 2.1" |
| December | 15°F | 44°F | 28°F | 3.1" |
| Index | Larkspur | Colorado | National |
| Air quality index | 45 | 38 | 42 |
| Pollution index | 1,130,190 | 2,068,342 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 259 |
| Days with moderate air quality | 106 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.010% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Black Forest, CO | 13,103 | 45 | 10.0% |
| Perry Park, CO | 1,821 | 45 | 10.0% |
| Westcreek, CO | 273 | 45 | 10.0% |
| Gleneagle, CO | 6,256 | 45 | 10.0% |
| Woodmoor, CO | 8,474 | 45 | 10.0% |
| Larkspur, CO | 244 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Lead Hill, AR | 244 | 36 | 28.0% |
| Lost Bridge Village, AR | 244 | 44 | 12.0% |
| Lazy Y U, AZ | 244 | 13 | 74.0% |
| Benton, CA | 244 | 47 | 6.0% |
| Grover, CO | 244 | 43 | 14.0% |
| Larkspur, CO | 244 | 45 | 10.0% |
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