| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 17°F | 34°F | 25°F | 0.7" |
| February | 18°F | 36°F | 26°F | 2.1" |
| March | 33°F | 53°F | 41°F | 4.1" |
| April | 43°F | 66°F | 53°F | 4.8" |
| May | 53°F | 75°F | 63°F | 6.2" |
| June | 63°F | 84°F | 73°F | 5.9" |
| July | 65°F | 86°F | 75°F | 5.6" |
| August | 63°F | 84°F | 73°F | 2.0" |
| September | 55°F | 79°F | 65°F | 4.1" |
| October | 44°F | 66°F | 54°F | 6.1" |
| November | 33°F | 51°F | 41°F | 3.3" |
| December | 22°F | 38°F | 30°F | 3.1" |
| Index | Fredonia | Iowa | National |
| Air quality index | 32 | 39 | 42 |
| Pollution index | 975,807 | 1,154,535 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 300 |
| Days with moderate air quality | 65 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.150% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.040% |
| Mercury | 0.150% |
| City | Population | Air Quality Index | National Avg. |
| Nichols, IA | 376 | 32 | 36.0% |
| Cotter, IA | 21 | 32 | 36.0% |
| Morning Sun, IA | 726 | 32 | 36.0% |
| Muscatine, IA | 23,661 | 32 | 36.0% |
| Crawfordsville, IA | 334 | 32 | 36.0% |
| Fredonia, IA | 234 | 32 | 36.0% |
| City | Population | Air Quality Index | National Avg. |
| Elmira, CA | 234 | 35 | 30.0% |
| Colp, IL | 234 | 43 | 14.0% |
| Lake Ka-Ho, IL | 234 | 54 | 8.0% |
| Americus, IN | 234 | 42 | 16.0% |
| Copper City, MI | 234 | 8 | 84.0% |
| Fredonia, IA | 234 | 32 | 36.0% |
Here are the best places to live in Iowa
See the best places to live in Fredonia
Safest States In The US
Check out the 10 most dangerous cities in Iowa