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| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 9°F | 26°F | 17°F | 1.0" |
| February | 13°F | 30°F | 21°F | 1.0" |
| March | 27°F | 48°F | 36°F | 6.5" |
| April | 37°F | 62°F | 49°F | 6.0" |
| May | 51°F | 73°F | 61°F | 5.9" |
| June | 61°F | 84°F | 72°F | 4.4" |
| July | 63°F | 87°F | 75°F | 7.6" |
| August | 61°F | 83°F | 71°F | 7.9" |
| September | 54°F | 79°F | 65°F | 6.8" |
| October | 41°F | 65°F | 52°F | 3.1" |
| November | 25°F | 47°F | 35°F | 3.7" |
| December | 9°F | 25°F | 17°F | 1.0" |
| Index | Ayrshire | Iowa | National |
| Air quality index | 15 | 39 | 42 |
| Pollution index | 769,697 | 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 | 0.002% |
| Mercury | 0.000% |
| City | Population | Air Quality Index | National Avg. |
| Cylinder, IA | 120 | 15 | 70.0% |
| Graettinger, IA | 1,044 | 15 | 70.0% |
| Ruthven, IA | 771 | 15 | 70.0% |
| Mallard, IA | 227 | 15 | 70.0% |
| Emmetsburg, IA | 3,706 | 15 | 70.0% |
| Ayrshire, IA | 145 | 15 | 70.0% |
| City | Population | Air Quality Index | National Avg. |
| Port Lions, AK | 145 | 31 | 38.0% |
| Tanacross, AK | 145 | 38 | 24.0% |
| Orrville, AL | 145 | 52 | 4.0% |
| Bieber, CA | 145 | 42 | 16.0% |
| Daphnedale Park, CA | 145 | 29 | 42.0% |
| Ayrshire, IA | 145 | 15 | 70.0% |
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