Westphalia, 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 19.1 °C (high). Annual precipitation averages 1016.3 Millimeters. Westphalia is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.3 °C | 5.1 °C | 28.7 mm |
| February | -4.2 °C | 7.7 °C | 39.37 mm |
| March | 0.9 °C | 13.7 °C | 65.28 mm |
| April | 6.4 °C | 19.2 °C | 101.85 mm |
| May | 12.7 °C | 23.8 °C | 142.75 mm |
| June | 18.1 °C | 29.2 °C | 130.05 mm |
| July | 20.4 °C | 31.7 °C | 112.27 mm |
| August | 19.3 °C | 31.5 °C | 100.08 mm |
| September | 14.7 °C | 27.1 °C | 109.98 mm |
| October | 7.7 °C | 20.6 °C | 87.63 mm |
| November | 1.4 °C | 13.3 °C | 57.15 mm |
| December | -4 °C | 6.8 °C | 41.15 mm |
| Annual | 7.3 °C | 19.1 °C | 1016.26 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| 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 |