Westphalia, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45.1 °F (low) to 66.4 °F (high). Annual precipitation averages 40 Inches. 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 | 20.6 °F | 41.1 °F | 1.13 in. |
| February | 24.4 °F | 45.8 °F | 1.55 in. |
| March | 33.7 °F | 56.7 °F | 2.57 in. |
| April | 43.5 °F | 66.5 °F | 4.01 in. |
| May | 54.9 °F | 74.9 °F | 5.62 in. |
| June | 64.6 °F | 84.5 °F | 5.12 in. |
| July | 68.8 °F | 89.1 °F | 4.42 in. |
| August | 66.8 °F | 88.7 °F | 3.94 in. |
| September | 58.5 °F | 80.7 °F | 4.33 in. |
| October | 45.9 °F | 69.0 °F | 3.45 in. |
| November | 34.6 °F | 55.9 °F | 2.25 in. |
| December | 24.8 °F | 44.2 °F | 1.62 in. |
| Annual | 45.1 °F | 66.4 °F | 40.01 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |