| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 12°F | 29°F | 20°F | 2.5" |
| February | 16°F | 34°F | 25°F | 2.2" |
| March | 21°F | 41°F | 30°F | 3.6" |
| April | 27°F | 49°F | 37°F | 2.2" |
| May | 34°F | 61°F | 47°F | 1.9" |
| June | 42°F | 70°F | 56°F | 2.1" |
| July | 48°F | 83°F | 66°F | 0.5" |
| August | 45°F | 81°F | 63°F | 0.5" |
| September | 38°F | 72°F | 54°F | 1.1" |
| October | 31°F | 55°F | 41°F | 1.8" |
| November | 22°F | 40°F | 30°F | 2.6" |
| December | 13°F | 29°F | 21°F | 3.4" |
| Index | McCall | Idaho | National |
| Air quality index | 36 | 32 | 42 |
| Pollution index | 1,490,030 | 2,063,710 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 293 |
| Days with moderate air quality | 60 |
| Days w/ poor A.Q. for sensitive groups | 9 |
| Days with unhealthy air quality | 3 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.000% |
| Lead | 0.020% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| New Meadows, ID | 352 | 20 | 60.0% |
| Donnelly, ID | 153 | 36 | 28.0% |
| McCall, ID | 3,485 | 36 | 28.0% |
| City | Population | Air Quality Index | National Avg. |
| Locust Valley, NY | 3,485 | 51 | 2.0% |
| Venice Gardens, FL | 3,484 | 38 | 24.0% |
| Blackshear, GA | 3,484 | 26 | 48.0% |
| York Harbor, ME | 3,484 | 40 | 20.0% |
| Loyalhanna, PA | 3,486 | 39 | 22.0% |
| McCall, ID | 3,485 | 36 | 28.0% |
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