Newton, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.9 °F (low) to 67.1 °F (high). Annual precipitation averages 34.1 Inches. Newton is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.9 °F | 41.8 °F | 0.8 in. |
| February | 24.1 °F | 46.2 °F | 1.32 in. |
| March | 33.6 °F | 56.9 °F | 2.43 in. |
| April | 43.0 °F | 66.3 °F | 2.93 in. |
| May | 54.3 °F | 75.6 °F | 5.08 in. |
| June | 64.5 °F | 86.3 °F | 4.91 in. |
| July | 68.8 °F | 91.1 °F | 4.29 in. |
| August | 67.0 °F | 89.5 °F | 3.89 in. |
| September | 58.6 °F | 81.8 °F | 3.06 in. |
| October | 45.8 °F | 69.6 °F | 2.64 in. |
| November | 33.7 °F | 55.8 °F | 1.54 in. |
| December | 24.1 °F | 44.0 °F | 1.23 in. |
| Annual | 44.9 °F | 67.1 °F | 34.12 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |