New Melle, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45.4 °F (low) to 65.8 °F (high). Annual precipitation averages 43.8 Inches. New Melle 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.0 °F | 39.8 °F | 2.54 in. |
| February | 25.2 °F | 45.3 °F | 2.41 in. |
| March | 34.0 °F | 55.4 °F | 3.5 in. |
| April | 44.7 °F | 67.3 °F | 4.73 in. |
| May | 54.7 °F | 75.8 °F | 5.23 in. |
| June | 64.3 °F | 83.9 °F | 4.56 in. |
| July | 67.9 °F | 87.9 °F | 4.07 in. |
| August | 66.1 °F | 86.8 °F | 3.7 in. |
| September | 57.9 °F | 80.1 °F | 3.51 in. |
| October | 46.3 °F | 68.6 °F | 3.38 in. |
| November | 35.3 °F | 55.2 °F | 3.47 in. |
| December | 26.5 °F | 43.7 °F | 2.7 in. |
| Annual | 45.4 °F | 65.8 °F | 43.8 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |