| 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 | Sexton | Iowa | National |
| Air quality index | 15 | 39 | 42 |
| Pollution index | 1,476,650 | 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 | 0.020% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.000% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Algona, IA | 5,415 | 15 | 70.0% |
| Lone Rock, IA | 179 | 15 | 70.0% |
| Woden, IA | 177 | 15 | 70.0% |
| Livermore, IA | 434 | 15 | 70.0% |
| Britt, IA | 1,761 | 15 | 70.0% |
| Sexton, IA | 0 | 15 | 70.0% |
| City | Population | Air Quality Index | National Avg. |
| Chase, AK | 0 | 31 | 38.0% |
| Chiniak, AK | 0 | 31 | 38.0% |
| Chisana, AK | 0 | 31 | 38.0% |
| Dot Lake, AK | 0 | 38 | 24.0% |
| Eureka Roadhouse, AK | 0 | 31 | 38.0% |
| Sexton, IA | 0 | 15 | 70.0% |
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