Westmoreland, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.8 °C (low) to 18.5 °C (high). Annual precipitation averages 893.3 Millimeters. Westmoreland 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 | -8.2 °C | 3.7 °C | 19.3 mm |
| February | -6.3 °C | 6.3 °C | 28.45 mm |
| March | -0.7 °C | 12.7 °C | 54.86 mm |
| April | 5 °C | 18.6 °C | 89.92 mm |
| May | 11.4 °C | 23.6 °C | 131.32 mm |
| June | 17.2 °C | 29 °C | 136.65 mm |
| July | 19.6 °C | 31.8 °C | 111.76 mm |
| August | 18.2 °C | 30.9 °C | 106.43 mm |
| September | 13.2 °C | 26.7 °C | 80.26 mm |
| October | 6.2 °C | 20.2 °C | 63.5 mm |
| November | -0.5 °C | 12.3 °C | 41.91 mm |
| December | -6.1 °C | 5.6 °C | 28.96 mm |
| Annual | 5.8 °C | 18.5 °C | 893.32 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 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |