| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 21°F | 37°F | 28°F | 3.7" |
| February | 22°F | 40°F | 30°F | 2.7" |
| March | 34°F | 54°F | 43°F | 3.0" |
| April | 44°F | 67°F | 54°F | 5.7" |
| May | 54°F | 76°F | 64°F | 5.7" |
| June | 62°F | 83°F | 72°F | 5.5" |
| July | 64°F | 85°F | 74°F | 5.1" |
| August | 62°F | 84°F | 72°F | 4.8" |
| September | 55°F | 80°F | 66°F | 4.3" |
| October | 45°F | 67°F | 55°F | 4.9" |
| November | 34°F | 53°F | 43°F | 4.5" |
| December | 27°F | 41°F | 33°F | 5.4" |
| Index | Mecca | Indiana | National |
| Air quality index | 45 | 56 | 42 |
| Pollution index | 1,601,640 | 2,719,453 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 237 |
| Days with moderate air quality | 127 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.004% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.040% |
| Mercury | 0.290% |
| City | Population | Air Quality Index | National Avg. |
| Fontanet, IN | 468 | 45 | 10.0% |
| Shepardsville, IN | 117 | 45 | 10.0% |
| Harmony, IN | 965 | 45 | 10.0% |
| Fairview Park, IN | 1,242 | 45 | 10.0% |
| Newport, IN | 309 | 45 | 10.0% |
| Mecca, IN | 583 | 45 | 10.0% |
| City | Population | Air Quality Index | National Avg. |
| Stinson Beach, CA | 583 | 40 | 20.0% |
| Bowen, IL | 583 | 41 | 18.0% |
| Higgins, TX | 583 | 15 | 70.0% |
| Manchester, VT | 583 | 35 | 30.0% |
| Chenequa, WI | 583 | 37 | 26.0% |
| Mecca, IN | 583 | 45 | 10.0% |
Here are the best places to live in Indiana
These are the 10 cheapest cities in Indiana
Check out the 10 safest cities in Indiana
Most Dangerous Cities In The US