| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 24°F | 45°F | 33°F | 2.4" |
| February | 25°F | 48°F | 35°F | 2.2" |
| March | 37°F | 61°F | 48°F | 3.6" |
| April | 47°F | 72°F | 59°F | 5.4" |
| May | 57°F | 80°F | 68°F | 4.6" |
| June | 67°F | 89°F | 78°F | 5.2" |
| July | 70°F | 92°F | 81°F | 4.2" |
| August | 69°F | 91°F | 79°F | 3.6" |
| September | 61°F | 84°F | 72°F | 4.3" |
| October | 48°F | 72°F | 60°F | 3.4" |
| November | 37°F | 60°F | 48°F | 3.4" |
| December | 27°F | 47°F | 37°F | 3.5" |
| Index | Pasadena Hills | Missouri | National |
| Air quality index | 54 | 97 | 42 |
| Pollution index | 8,473,050 | 1,630,255 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 134 |
| Days with moderate air quality | 221 |
| Days w/ poor A.Q. for sensitive groups | 8 |
| Days with unhealthy air quality | 2 |
| Pollutant | Total |
| Arsenic | 0.020% |
| Benzene | 0.070% |
| Carbon Tetrachloride | 0.020% |
| Lead | 0.010% |
| Mercury | 0.010% |
| City | Population | Air Quality Index | National Avg. |
| West Alton, MO | 451 | 54 | 8.0% |
| Washington Park, IL | 3,909 | 54 | 8.0% |
| Crystal Lake Park, MO | 440 | 54 | 8.0% |
| Ladue, MO | 8,631 | 54 | 8.0% |
| Oakland, MO | 1,538 | 54 | 8.0% |
| Pasadena Hills, MO | 1,123 | 54 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Cotter, AR | 1,123 | 36 | 28.0% |
| Centennial Park, AZ | 1,123 | 44 | 12.0% |
| Blades, DE | 1,123 | 36 | 28.0% |
| Greenleaf, ID | 1,123 | 36 | 28.0% |
| Morrisonville, IL | 1,123 | 40 | 20.0% |
| Pasadena Hills, MO | 1,123 | 54 | 8.0% |
Here are the best places to live in Missouri
These are the 10 cheapest cities in Missouri
Check out the 10 safest cities in Missouri
Most Dangerous States In The US