Gypsum, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.9 °C (low) to 19.4 °C (high). Annual precipitation averages 822.7 Millimeters. Gypsum 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.6 °C | 5 °C | 21.34 mm |
| February | -4.9 °C | 7.5 °C | 30.48 mm |
| March | 0.5 °C | 13.7 °C | 54.1 mm |
| April | 5.7 °C | 18.8 °C | 71.12 mm |
| May | 12.1 °C | 24.2 °C | 128.52 mm |
| June | 18 °C | 30.4 °C | 108.46 mm |
| July | 20.6 °C | 33.2 °C | 106.93 mm |
| August | 19.4 °C | 32 °C | 99.31 mm |
| September | 14.6 °C | 27.6 °C | 73.41 mm |
| October | 7.3 °C | 20.9 °C | 61.21 mm |
| November | 0.4 °C | 13.1 °C | 36.58 mm |
| December | -4.9 °C | 6.3 °C | 31.24 mm |
| Annual | 6.9 °C | 19.4 °C | 822.7 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |