Montezuma, Kansas has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 5.1 °C (low) to 20.5 °C (high). Annual precipitation averages 542.8 Millimeters. Montezuma 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 | -7.3 °C | 7.6 °C | 13.21 mm |
| February | -5.8 °C | 9.7 °C | 13.97 mm |
| March | -1.2 °C | 15.1 °C | 33.78 mm |
| April | 3.6 °C | 19.7 °C | 43.43 mm |
| May | 9.9 °C | 25.3 °C | 70.87 mm |
| June | 15.9 °C | 30.9 °C | 88.14 mm |
| July | 18.5 °C | 33.3 °C | 74.93 mm |
| August | 17.5 °C | 32.1 °C | 76.2 mm |
| September | 12.8 °C | 28.3 °C | 39.12 mm |
| October | 5.3 °C | 21.4 °C | 50.04 mm |
| November | -1.7 °C | 14.2 °C | 16.76 mm |
| December | -6.4 °C | 7.8 °C | 22.35 mm |
| Annual | 5.1 °C | 20.5 °C | 542.8 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 | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |