| 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 | Breckenridge Hills | Missouri | National |
| Air quality index | 54 | 97 | 42 |
| Pollution index | 8,870,230 | 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 | 0.180% |
| Benzene | 0.060% |
| Carbon Tetrachloride | 0.020% |
| Lead | 0.030% |
| Mercury | 0.120% |
| City | Population | Air Quality Index | National Avg. |
| Alton, IL | 26,490 | 54 | 8.0% |
| Portage Des Sioux, MO | 305 | 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% |
| Breckenridge Hills, MO | 4,590 | 54 | 8.0% |
| City | Population | Air Quality Index | National Avg. |
| Montebello, NY | 4,590 | 51 | 2.0% |
| Melville, SK | 4,590 | n/a | |
| Haleiwa, HI | 4,589 | 30 | 40.0% |
| Palacios, TX | 4,589 | 31 | 38.0% |
| Wayzata, MN | 4,591 | 46 | 8.0% |
| Breckenridge Hills, MO | 4,590 | 54 | 8.0% |
Here are the best places to live in Missouri
Top 10 cities in Missouri with the best education system
Top 10 best public schools in Breckenridge Hills
Check out the 10 safest cities in Missouri