Brownell, Kansas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 4.4 °C (low) to 20 °C (high). Annual precipitation averages 588.3 Millimeters. Brownell is located in USDA Plant Hardiness Zone 6a. 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 | -8.4 °C | 6.3 °C | 13.97 mm |
| February | -6.9 °C | 8.6 °C | 17.78 mm |
| March | -2.3 °C | 14.2 °C | 33.53 mm |
| April | 2.8 °C | 19.2 °C | 51.05 mm |
| May | 9.1 °C | 24.6 °C | 87.12 mm |
| June | 15.3 °C | 30.8 °C | 82.55 mm |
| July | 18.3 °C | 33.6 °C | 91.44 mm |
| August | 17.1 °C | 32.3 °C | 77.22 mm |
| September | 12.2 °C | 28.2 °C | 44.96 mm |
| October | 4.6 °C | 21.2 °C | 44.45 mm |
| November | -2.3 °C | 13.3 °C | 21.08 mm |
| December | -7.3 °C | 7.1 °C | 23.11 mm |
| Annual | 4.4 °C | 20 °C | 588.26 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 6a : -23.3°C to -20.6°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 |