Richfield, Kansas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 4.7 °C (low) to 21 °C (high). Annual precipitation averages 439.7 Millimeters. Richfield is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7 °C | 8.7 °C | 9.91 mm |
| February | -5.8 °C | 10.7 °C | 7.62 mm |
| March | -1.7 °C | 15.6 °C | 26.16 mm |
| April | 2.9 °C | 20.1 °C | 33.27 mm |
| May | 9.1 °C | 25.5 °C | 51.05 mm |
| June | 15.1 °C | 31.3 °C | 67.31 mm |
| July | 17.8 °C | 33.8 °C | 68.58 mm |
| August | 16.8 °C | 32.4 °C | 75.18 mm |
| September | 12.2 °C | 28.6 °C | 35.56 mm |
| October | 4.7 °C | 21.8 °C | 41.4 mm |
| November | -1.8 °C | 14.7 °C | 11.68 mm |
| December | -6.3 °C | 8.7 °C | 11.94 mm |
| Annual | 4.7 °C | 21 °C | 439.66 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |