New Madrid, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.5 °C (low) to 20.5 °C (high). Annual precipitation averages 1303.8 Millimeters. New Madrid 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 | -2.4 °C | 6.6 °C | 93.73 mm |
| February | -0.7 °C | 9.2 °C | 102.11 mm |
| March | 3.8 °C | 14.7 °C | 121.92 mm |
| April | 9.2 °C | 21.1 °C | 136.14 mm |
| May | 15.1 °C | 26.1 °C | 142.75 mm |
| June | 19.6 °C | 30.7 °C | 104.9 mm |
| July | 21.6 °C | 32.2 °C | 96.01 mm |
| August | 20.2 °C | 31.8 °C | 73.66 mm |
| September | 15.8 °C | 28.3 °C | 93.73 mm |
| October | 9.2 °C | 22.2 °C | 104.9 mm |
| November | 3.6 °C | 14.4 °C | 112.01 mm |
| December | -0.6 °C | 8.4 °C | 121.92 mm |
| Annual | 9.5 °C | 20.5 °C | 1303.78 mm |
| 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 : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |