Valley Park, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.4 °F (low) to 66.5 °F (high). Annual precipitation averages 44.6 Inches. Valley Park is located in USDA Plant Hardiness Zone 6b. 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 | 22.6 °F | 39.8 °F | 2.86 in. |
| February | 26.3 °F | 45.5 °F | 2.45 in. |
| March | 35.0 °F | 55.3 °F | 3.66 in. |
| April | 45.7 °F | 68.1 °F | 4.77 in. |
| May | 56.4 °F | 76.8 °F | 5.47 in. |
| June | 65.4 °F | 85.3 °F | 4.65 in. |
| July | 69.3 °F | 88.8 °F | 4.11 in. |
| August | 67.3 °F | 87.5 °F | 3.52 in. |
| September | 58.8 °F | 81.0 °F | 3.38 in. |
| October | 46.9 °F | 69.3 °F | 3.32 in. |
| November | 35.9 °F | 55.6 °F | 3.67 in. |
| December | 27.0 °F | 44.5 °F | 2.77 in. |
| Annual | 46.4 °F | 66.5 °F | 44.63 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 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |