Nortonville, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.7 °C (low) to 18.4 °C (high). Annual precipitation averages 956.8 Millimeters. Nortonville 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.1 °C | 3.5 °C | 23.11 mm |
| February | -5.1 °C | 6.3 °C | 32.77 mm |
| March | 0.3 °C | 12.8 °C | 56.9 mm |
| April | 6.2 °C | 18.7 °C | 94.74 mm |
| May | 12.1 °C | 23.9 °C | 132.33 mm |
| June | 17.6 °C | 29 °C | 127.76 mm |
| July | 20.2 °C | 31.6 °C | 120.14 mm |
| August | 18.9 °C | 30.9 °C | 109.22 mm |
| September | 14.1 °C | 26.7 °C | 96.77 mm |
| October | 7.6 °C | 20 °C | 77.22 mm |
| November | 0.9 °C | 12.2 °C | 48.51 mm |
| December | -4.9 °C | 5.3 °C | 37.34 mm |
| Annual | 6.7 °C | 18.4 °C | 956.81 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 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |