| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 8°F | 25°F | 16°F | 0.4" |
| February | 10°F | 28°F | 18°F | 0.5" |
| March | 25°F | 44°F | 33°F | 1.4" |
| April | 36°F | 60°F | 46°F | 3.1" |
| May | 47°F | 72°F | 59°F | 4.2" |
| June | 58°F | 81°F | 69°F | 4.7" |
| July | 61°F | 84°F | 72°F | 2.7" |
| August | 59°F | 80°F | 69°F | 4.0" |
| September | 50°F | 75°F | 62°F | 2.9" |
| October | 38°F | 61°F | 49°F | 3.1" |
| November | 25°F | 46°F | 35°F | 1.0" |
| December | 12°F | 29°F | 20°F | 0.8" |
| Index | Whittemore | Iowa | National |
| Air quality index | 15 | 39 | 42 |
| Pollution index | 426,616 | 1,154,535 | 2,726,193 |
| Measurement | Total |
| Days measured | 118 |
| Days with good air quality | 118 |
| Days with moderate air quality | 0 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Cylinder, IA | 120 | 15 | 70.0% |
| Lone Rock, IA | 179 | 15 | 70.0% |
| Plover, IA | 97 | 15 | 70.0% |
| St. Joseph, IA | 122 | 15 | 70.0% |
| Emmetsburg, IA | 3,706 | 15 | 70.0% |
| Whittemore, IA | 576 | 15 | 70.0% |
| City | Population | Air Quality Index | National Avg. |
| Onyx, CA | 576 | 67 | 34.0% |
| Yankeetown, FL | 576 | 30 | 40.0% |
| Coolidge, GA | 576 | 35 | 30.0% |
| Island, KY | 576 | 43 | 14.0% |
| Interlaken, NY | 576 | 34 | 32.0% |
| Whittemore, IA | 576 | 15 | 70.0% |
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