Weldon Spring Heights, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 46.4 °F (low) to 66.3 °F (high). Annual precipitation averages 43.5 Inches. Weldon Spring 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 | 40.4 °F | 2.63 in. |
| February | 25.9 °F | 45.8 °F | 2.44 in. |
| March | 35.2 °F | 56.2 °F | 3.61 in. |
| April | 45.7 °F | 67.4 °F | 4.82 in. |
| May | 56.2 °F | 76.2 °F | 5.06 in. |
| June | 65.4 °F | 84.6 °F | 4.56 in. |
| July | 68.8 °F | 88.3 °F | 3.85 in. |
| August | 67.3 °F | 87.2 °F | 3.58 in. |
| September | 58.6 °F | 80.6 °F | 3.22 in. |
| October | 47.2 °F | 68.8 °F | 3.35 in. |
| November | 36.3 °F | 55.7 °F | 3.56 in. |
| December | 27.6 °F | 44.6 °F | 2.81 in. |
| Annual | 46.4 °F | 66.3 °F | 43.49 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 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |