Maryland Heights, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 46.9 °F (low) to 66.2 °F (high). Annual precipitation averages 43.1 Inches. Maryland Heights is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.1 °F | 39.6 °F | 2.63 in. |
| February | 26.6 °F | 45.3 °F | 2.23 in. |
| March | 35.3 °F | 55.4 °F | 3.51 in. |
| April | 46.1 °F | 67.3 °F | 4.75 in. |
| May | 56.8 °F | 76.3 °F | 5.09 in. |
| June | 65.9 °F | 84.9 °F | 4.57 in. |
| July | 69.8 °F | 88.5 °F | 3.96 in. |
| August | 67.8 °F | 87.3 °F | 3.59 in. |
| September | 59.5 °F | 80.7 °F | 3.2 in. |
| October | 47.8 °F | 69.0 °F | 3.35 in. |
| November | 36.4 °F | 55.3 °F | 3.52 in. |
| December | 27.7 °F | 44.3 °F | 2.73 in. |
| Annual | 46.9 °F | 66.2 °F | 43.13 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |