| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 21°F | 34°F | 28°F | 1.5" |
| February | 24°F | 36°F | 30°F | 0.4" |
| March | 15°F | 31°F | 23°F | 0.1" |
| April | 29°F | 42°F | 35°F | 0.4" |
| May | 36°F | 49°F | 42°F | 1.2" |
| June | 36°F | 53°F | 45°F | 1.6" |
| July | 41°F | 57°F | 50°F | 1.5" |
| August | 46°F | 62°F | 54°F | 1.4" |
| September | 38°F | 56°F | 48°F | 2.9" |
| October | 32°F | 45°F | 39°F | 6.0" |
| November | 22°F | 35°F | 29°F | 2.6" |
| December | 23°F | 38°F | 31°F | 0.5" |
| Index | Port Heiden | Alaska | National |
| Air quality index | 31 | 30 | 50 |
| Pollution index | 482,844 | 11,990,286 | 5,066,862 |
| 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 | 0.010% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City, State | Population | Air Quality Index | National Avg. |
| Port Heiden, AK | 73 | 31 | 38% |
| City, State | Population | Air Quality Index | National Avg. |
| Saronville, NE | 73 | 19 | 62% |
| Gay, GA | 73 | 42 | 16% |
| Weston, CO | 73 | 15 | 70% |
| Pinehill, NM | 73 | 17 | 66% |
| Vining, IA | 73 | 39 | 22% |
| Port Heiden, AK | 73 | 31 | 38% |
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