Preston, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.3 °C (low) to 20 °C (high). Annual precipitation averages 736.8 Millimeters. Preston is located in USDA Plant Hardiness Zone 7a. 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 | -5.3 °C | 6.6 °C | 18.03 mm |
| February | -3.8 °C | 8.8 °C | 24.64 mm |
| March | 1.3 °C | 14.3 °C | 51.05 mm |
| April | 6.2 °C | 19.4 °C | 56.13 mm |
| May | 12.3 °C | 24.7 °C | 118.62 mm |
| June | 17.7 °C | 30.5 °C | 104.9 mm |
| July | 20.2 °C | 33 °C | 95.76 mm |
| August | 19.2 °C | 31.9 °C | 92.2 mm |
| September | 14.8 °C | 27.9 °C | 59.18 mm |
| October | 7.7 °C | 21.3 °C | 58.67 mm |
| November | 0.9 °C | 13.7 °C | 31.24 mm |
| December | -3.9 °C | 7.3 °C | 26.42 mm |
| Annual | 7.3 °C | 20 °C | 736.84 mm |
| 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 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |