| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 19°F | 34°F | 26°F | 1.2" |
| February | 24°F | 42°F | 32°F | 0.7" |
| March | 30°F | 53°F | 40°F | 1.1" |
| April | 35°F | 61°F | 46°F | 1.1" |
| May | 42°F | 71°F | 55°F | 1.3" |
| June | 50°F | 82°F | 65°F | 0.5" |
| July | 58°F | 91°F | 74°F | 0.1" |
| August | 55°F | 88°F | 71°F | 0.4" |
| September | 48°F | 79°F | 62°F | 0.4" |
| October | 38°F | 64°F | 49°F | 1.1" |
| November | 29°F | 49°F | 38°F | 1.0" |
| December | 20°F | 35°F | 27°F | 1.3" |
| Index | Carey | Idaho | National |
| Air quality index | 20 | 32 | 42 |
| Pollution index | 1,651,620 | 2,063,710 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 361 |
| Days with moderate air quality | 4 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.001% |
| Benzene | 0.020% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.020% |
| Mercury | 0.001% |
| City | Population | Air Quality Index | National Avg. |
| Carey, ID | 1,265 | 20 | 60.0% |
| City | Population | Air Quality Index | National Avg. |
| Riley, KS | 1,265 | 32 | 36.0% |
| New Sarpy, LA | 1,265 | 45 | 10.0% |
| Weidman, MI | 1,265 | 36 | 28.0% |
| North Ballston Spa, NY | 1,265 | 37 | 26.0% |
| Windsor, PA | 1,265 | 41 | 18.0% |
| Carey, ID | 1,265 | 20 | 60.0% |
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