| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 15°F | 40°F | 27°F | 1.0" |
| February | 21°F | 52°F | 34°F | 0.7" |
| March | 26°F | 61°F | 43°F | 3.3" |
| April | 32°F | 63°F | 47°F | 5.5" |
| May | 40°F | 68°F | 52°F | 5.4" |
| June | 52°F | 85°F | 68°F | 4.2" |
| July | 56°F | 90°F | 72°F | 4.3" |
| August | 53°F | 87°F | 69°F | 2.5" |
| September | 48°F | 83°F | 64°F | 2.2" |
| October | 36°F | 69°F | 52°F | 3.1" |
| November | 25°F | 58°F | 40°F | 1.6" |
| December | 13°F | 40°F | 25°F | 1.2" |
| Index | Weldona | Colorado | National |
| Air quality index | 45 | 38 | 42 |
| Pollution index | 925,959 | 2,068,342 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 252 |
| Days with moderate air quality | 110 |
| Days w/ poor A.Q. for sensitive groups | 3 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.003% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Jackson Lake, CO | 138 | 45 | 10.0% |
| Trail Side, CO | 138 | 45 | 10.0% |
| Log Lane Village, CO | 1,057 | 45 | 10.0% |
| Wiggins, CO | 1,170 | 45 | 10.0% |
| Orchard, CO | 111 | 45 | 10.0% |
| Weldona, CO | 188 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Adak, AK | 188 | 31 | 38.0% |
| Halibut Cove, AK | 188 | 31 | 38.0% |
| Nikolaevsk, AK | 188 | 31 | 38.0% |
| Bluff City, AR | 188 | 32 | 36.0% |
| Pinion Pines, AZ | 188 | 13 | 74.0% |
| Weldona, CO | 188 | 45 | 10.0% |
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