Weldon Spring Heights, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 8 °C (low) to 19.1 °C (high). Annual precipitation averages 1104.6 Millimeters. 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 | -4.9 °C | 4.7 °C | 66.8 mm |
| February | -3.4 °C | 7.7 °C | 61.98 mm |
| March | 1.8 °C | 13.4 °C | 91.69 mm |
| April | 7.6 °C | 19.7 °C | 122.43 mm |
| May | 13.4 °C | 24.6 °C | 128.52 mm |
| June | 18.6 °C | 29.2 °C | 115.82 mm |
| July | 20.4 °C | 31.3 °C | 97.79 mm |
| August | 19.6 °C | 30.7 °C | 90.93 mm |
| September | 14.8 °C | 27 °C | 81.79 mm |
| October | 8.4 °C | 20.4 °C | 85.09 mm |
| November | 2.4 °C | 13.2 °C | 90.42 mm |
| December | -2.4 °C | 7 °C | 71.37 mm |
| Annual | 8 °C | 19.1 °C | 1104.63 mm |
| 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 : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |