| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 13°F | 36°F | 23°F | 0.3" |
| February | 18°F | 42°F | 29°F | 1.8" |
| March | 28°F | 59°F | 42°F | 1.9" |
| April | 34°F | 63°F | 47°F | 2.3" |
| May | 44°F | 75°F | 59°F | 4.5" |
| June | 54°F | 85°F | 68°F | 3.2" |
| July | 60°F | 93°F | 76°F | 5.1" |
| August | 60°F | 89°F | 73°F | 5.3" |
| September | 51°F | 85°F | 66°F | 1.6" |
| October | 40°F | 71°F | 53°F | 5.0" |
| November | 27°F | 59°F | 41°F | 0.8" |
| December | 16°F | 42°F | 27°F | 1.0" |
| Index | Vona | Colorado | National |
| Air quality index | 45 | 38 | 42 |
| Pollution index | 526,493 | 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 | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.001% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Seibert, CO | 119 | 45 | 10.0% |
| Stratton, CO | 754 | 45 | 10.0% |
| Vona, CO | 106 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Franklin CDP (Sacramento County), CA | 106 | 48 | 4.0% |
| Arion, IA | 106 | 40 | 20.0% |
| Carpenter, IA | 106 | 15 | 70.0% |
| Popejoy, IA | 106 | 15 | 70.0% |
| Willey, IA | 106 | 37 | 26.0% |
| Vona, CO | 106 | 45 | 10.0% |
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