| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 15°F | 30°F | 22°F | 1.2" |
| February | 16°F | 33°F | 23°F | 3.5" |
| March | 30°F | 48°F | 38°F | 4.0" |
| April | 40°F | 62°F | 50°F | 8.9" |
| May | 51°F | 73°F | 61°F | 8.7" |
| June | 62°F | 82°F | 71°F | 5.2" |
| July | 65°F | 84°F | 74°F | 6.6" |
| August | 63°F | 82°F | 72°F | 8.4" |
| September | 55°F | 77°F | 65°F | 5.0" |
| October | 43°F | 63°F | 52°F | 4.4" |
| November | 32°F | 49°F | 39°F | 7.4" |
| December | 19°F | 34°F | 26°F | 1.7" |
| Index | Luther | Iowa | National |
| Air quality index | 37 | 39 | 42 |
| Pollution index | 1,171,930 | 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 | 0.060% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.004% |
| Mercury | 0.050% |
| City | Population | Air Quality Index | National Avg. |
| Ames, IA | 66,361 | 37 | 26.0% |
| Boxholm, IA | 152 | 37 | 26.0% |
| Woodward, IA | 1,235 | 37 | 26.0% |
| Cambridge, IA | 941 | 37 | 26.0% |
| Gilbert, IA | 1,088 | 37 | 26.0% |
| Luther, IA | 153 | 37 | 26.0% |
| City | Population | Air Quality Index | National Avg. |
| Powhatan, AR | 153 | 45 | 10.0% |
| Hard Rock, AZ | 153 | 45 | 10.0% |
| Amador City, CA | 153 | 52 | 4.0% |
| Pine Flat, CA | 153 | 67 | 34.0% |
| Morriston, FL | 153 | 38 | 24.0% |
| Luther, IA | 153 | 37 | 26.0% |
Here are the best places to live in Iowa
Check out the 10 most dangerous cities in Iowa
See the best places to live in Luther
These are the 10 cheapest cities in Iowa