| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 26°F | 48°F | 35°F | 1.7" |
| February | 29°F | 51°F | 39°F | 1.7" |
| March | 40°F | 63°F | 50°F | 3.5" |
| April | 48°F | 71°F | 59°F | 5.6" |
| May | 57°F | 78°F | 67°F | 7.3" |
| June | 67°F | 88°F | 77°F | 6.2" |
| July | 70°F | 92°F | 80°F | 4.0" |
| August | 69°F | 91°F | 79°F | 4.6" |
| September | 61°F | 83°F | 71°F | 4.7" |
| October | 49°F | 72°F | 59°F | 3.9" |
| November | 39°F | 61°F | 49°F | 2.9" |
| December | 29°F | 49°F | 38°F | 2.7" |
| Index | Seneca | Missouri | National |
| Air quality index | 38 | 97 | 42 |
| Pollution index | 703,846 | 1,630,255 | 2,726,193 |
| Measurement | Total |
| Days measured | 363 |
| Days with good air quality | 289 |
| Days with moderate air quality | 73 |
| Days w/ poor A.Q. for sensitive groups | 1 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.000% |
| Benzene | 0.010% |
| Carbon Tetrachloride | 0.001% |
| Lead | 0.002% |
| Mercury | 0.250% |
| City | Population | Air Quality Index | National Avg. |
| Cliff Village, MO | 14 | 37 | 26.0% |
| Shoal Creek Estates, MO | 157 | 37 | 26.0% |
| Leawood, MO | 626 | 37 | 26.0% |
| Loma Linda, MO | 824 | 37 | 26.0% |
| Shoal Creek Drive, MO | 578 | 37 | 26.0% |
| Seneca, MO | 2,229 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Lake Placid, NY | 2,229 | 37 | 26.0% |
| Cave City, AR | 2,228 | 36 | 28.0% |
| Cayucos, CA | 2,228 | 46 | 8.0% |
| Mangonia Park, FL | 2,228 | 36 | 28.0% |
| Sainte-Cécile-de-Milton, QC | 2,228 | n/a | |
| Seneca, MO | 2,229 | 38 | 24.0% |
Here are the best places to live in Missouri
See the best places to live in Seneca
Safest Cities In The US
Check out the 10 most dangerous cities in Missouri