Newtown, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.1 °C (low) to 16.6 °C (high). Annual precipitation averages 982.2 Millimeters. Newtown is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.3 °C | 0.7 °C | 26.67 mm |
| February | -7.2 °C | 3.6 °C | 35.81 mm |
| March | -1.4 °C | 10.5 °C | 57.4 mm |
| April | 4.6 °C | 17.1 °C | 99.31 mm |
| May | 10.9 °C | 22.5 °C | 141.99 mm |
| June | 16.3 °C | 27.7 °C | 127 mm |
| July | 18.6 °C | 30.1 °C | 118.11 mm |
| August | 17.3 °C | 29.2 °C | 107.7 mm |
| September | 12.4 °C | 25.3 °C | 98.81 mm |
| October | 5.7 °C | 18.4 °C | 77.72 mm |
| November | -0.8 °C | 10.3 °C | 51.82 mm |
| December | -6.3 °C | 3.4 °C | 39.88 mm |
| Annual | 5.1 °C | 16.6 °C | 982.22 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |