| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 7°F | 22°F | 14°F | 0.8" |
| February | 12°F | 28°F | 19°F | 0.5" |
| March | 9°F | 27°F | 17°F | 1.2" |
| April | 25°F | 41°F | 32°F | 1.2" |
| May | 34°F | 53°F | 42°F | 1.3" |
| June | 43°F | 61°F | 51°F | 2.4" |
| July | 48°F | 63°F | 55°F | 2.8" |
| August | 48°F | 62°F | 54°F | 2.8" |
| September | 40°F | 55°F | 48°F | 3.0" |
| October | 30°F | 45°F | 37°F | 2.4" |
| November | 16°F | 31°F | 23°F | 1.6" |
| December | 12°F | 26°F | 19°F | 1.3" |
| Index | Igiugig | Alaska | National |
| Air quality index | 31 | 30 | 42 |
| Pollution index | 145,162 | 11,243,194 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 262 |
| Days with moderate air quality | 92 |
| Days w/ poor A.Q. for sensitive groups | 7 |
| Days with unhealthy air quality | 4 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.002% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Igiugig, AK | 60 | 31 | 38.0% |
| City | Population | Air Quality Index | National Avg. |
| Whitestone, AK | 60 | 38 | 24.0% |
| Petrey, AL | 60 | 52 | 4.0% |
| Haswell, CO | 60 | 20 | 60.0% |
| Lake Harbor, FL | 60 | 36 | 28.0% |
| Colwell, IA | 60 | 15 | 70.0% |
| Igiugig, AK | 60 | 31 | 38.0% |
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