Spearville, Kansas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 5.7 °C (low) to 20.2 °C (high). Annual precipitation averages 600.4 Millimeters. Spearville 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 | -6.9 °C | 7 °C | 15.75 mm |
| February | -5.4 °C | 9.2 °C | 15.75 mm |
| March | -0.8 °C | 14.6 °C | 35.05 mm |
| April | 4.2 °C | 19.4 °C | 51.82 mm |
| May | 10.7 °C | 24.8 °C | 85.34 mm |
| June | 16.6 °C | 30.8 °C | 87.12 mm |
| July | 19.1 °C | 33.6 °C | 91.69 mm |
| August | 18.1 °C | 32.3 °C | 82.8 mm |
| September | 13.3 °C | 28.3 °C | 42.67 mm |
| October | 5.8 °C | 21.3 °C | 51.05 mm |
| November | -1.1 °C | 13.7 °C | 19.81 mm |
| December | -5.8 °C | 7.7 °C | 21.59 mm |
| Annual | 5.7 °C | 20.2 °C | 600.44 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 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 | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |