| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 19°F | 36°F | 27°F | 2.6" |
| February | 20°F | 39°F | 29°F | 2.0" |
| March | 32°F | 53°F | 42°F | 2.7" |
| April | 42°F | 66°F | 53°F | 4.3" |
| May | 51°F | 75°F | 63°F | 4.4" |
| June | 61°F | 84°F | 72°F | 5.8" |
| July | 64°F | 85°F | 74°F | 4.8" |
| August | 62°F | 85°F | 73°F | 3.6" |
| September | 55°F | 79°F | 66°F | 3.2" |
| October | 44°F | 67°F | 55°F | 3.3" |
| November | 33°F | 53°F | 43°F | 3.1" |
| December | 24°F | 40°F | 31°F | 3.1" |
| Index | New Richmond | Indiana | National |
| Air quality index | 52 | 56 | 50 |
| Pollution index | 1,601,640 | 3,773,618 | 5,066,862 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 170 |
| Days with moderate air quality | 195 |
| Days w/ poor A.Q. for sensitive groups | |
| Days with unhealthy air quality |
| Pollutant | Total |
| Arsenic | 0.004% |
| Benzene | 0.030% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.040% |
| Mercury | 0.290% |
| City, State | Population | Air Quality Index | National Avg. |
| Alamo, IN | 57 | 52 | 4% |
| Darlington, IN | 780 | 52 | 4% |
| Linden, IN | 761 | 52 | 4% |
| Stockwell, IN | 627 | 52 | 4% |
| West Point, IN | 779 | 52 | 4% |
| New Richmond, IN | 350 | 52 | 4% |
| City, State | Population | Air Quality Index | National Avg. |
| Orient, IL | 350 | 39 | 22% |
| Roopville, GA | 350 | 52 | 4% |
| Selden, KS | 350 | 19 | 62% |
| Dowell, IL | 350 | 39 | 22% |
| Castalia, NC | 350 | 34 | 32% |
| New Richmond, IN | 350 | 52 | 4% |