| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 11°F | 29°F | 19°F | 0.5" |
| February | 15°F | 32°F | 22°F | 3.0" |
| March | 29°F | 50°F | 37°F | 2.2" |
| April | 39°F | 63°F | 50°F | 7.2" |
| May | 51°F | 74°F | 61°F | 8.1" |
| June | 62°F | 84°F | 72°F | 8.2" |
| July | 64°F | 87°F | 75°F | 9.1" |
| August | 63°F | 83°F | 72°F | 17.3" |
| September | 56°F | 81°F | 66°F | 7.3" |
| October | 44°F | 68°F | 53°F | 4.4" |
| November | 29°F | 51°F | 37°F | 4.8" |
| December | 12°F | 27°F | 19°F | 3.9" |
| Index | Pocahontas | Iowa | National |
| Air quality index | 37 | 39 | 42 |
| Pollution index | 426,616 | 1,154,535 | 2,726,193 |
| Measurement | Total |
| Days measured | 214 |
| Days with good air quality | 210 |
| Days with moderate air quality | 4 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| 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. |
| Mallard, IA | 227 | 15 | 70.0% |
| Ottosen, IA | 16 | 15 | 70.0% |
| Rolfe, IA | 648 | 15 | 70.0% |
| Plover, IA | 97 | 15 | 70.0% |
| Bradgate, IA | 133 | 15 | 70.0% |
| Pocahontas, IA | 1,420 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Taos, MO | 1,420 | 39 | 22.0% |
| Henryville, QC | 1,420 | n/a | |
| Velda City, MO | 1,421 | 54 | 8.0% |
| Stanfield, NC | 1,421 | 49 | 2.0% |
| Walnut Creek, NC | 1,419 | 40 | 20.0% |
| Pocahontas, IA | 1,420 | 37 | 26.0% |
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