Malden, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.5 °F (low) to 68.9 °F (high). Annual precipitation averages 49 Inches. Malden is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 27.8 °F | 43.8 °F | 3.33 in. |
| February | 31.0 °F | 48.9 °F | 3.79 in. |
| March | 38.9 °F | 58.6 °F | 4.66 in. |
| April | 48.8 °F | 69.7 °F | 5.36 in. |
| May | 59.4 °F | 79.1 °F | 5.27 in. |
| June | 67.9 °F | 87.6 °F | 3.45 in. |
| July | 71.3 °F | 89.9 °F | 4.14 in. |
| August | 69.0 °F | 88.9 °F | 2.78 in. |
| September | 61.1 °F | 83.0 °F | 3.38 in. |
| October | 49.1 °F | 72.1 °F | 3.84 in. |
| November | 38.7 °F | 58.1 °F | 4.44 in. |
| December | 30.9 °F | 47.1 °F | 4.57 in. |
| Annual | 49.5 °F | 68.9 °F | 49.01 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |