New London, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.9 °F (low) to 63.8 °F (high). Annual precipitation averages 38.4 Inches. New London is located in USDA Plant Hardiness Zone 6a. 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 | 19.2 °F | 36.0 °F | 1.74 in. |
| February | 22.6 °F | 41.1 °F | 2.1 in. |
| March | 32.1 °F | 52.4 °F | 2.76 in. |
| April | 43.1 °F | 64.6 °F | 4.13 in. |
| May | 53.9 °F | 74.6 °F | 4.78 in. |
| June | 63.4 °F | 83.5 °F | 4.49 in. |
| July | 67.0 °F | 87.3 °F | 4.01 in. |
| August | 65.0 °F | 86.0 °F | 3.46 in. |
| September | 56.6 °F | 79.3 °F | 3.36 in. |
| October | 45.1 °F | 66.9 °F | 3.07 in. |
| November | 33.8 °F | 52.9 °F | 2.49 in. |
| December | 24.4 °F | 40.7 °F | 2.03 in. |
| Annual | 43.9 °F | 63.8 °F | 38.42 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |