Alexander, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.4 °C (low) to 19.9 °C (high). Annual precipitation averages 623.8 Millimeters. Alexander 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 | -7.5 °C | 6.2 °C | 16.51 mm |
| February | -6 °C | 8.4 °C | 20.57 mm |
| March | -1.1 °C | 14.1 °C | 34.29 mm |
| April | 3.9 °C | 19.3 °C | 53.85 mm |
| May | 10.4 °C | 24.7 °C | 92.2 mm |
| June | 16.5 °C | 30.8 °C | 83.31 mm |
| July | 19.2 °C | 33.6 °C | 106.68 mm |
| August | 18 °C | 32.3 °C | 80.26 mm |
| September | 13.3 °C | 28.2 °C | 44.7 mm |
| October | 5.6 °C | 21.2 °C | 46.74 mm |
| November | -1.3 °C | 13.3 °C | 20.07 mm |
| December | -6.3 °C | 6.8 °C | 24.64 mm |
| Annual | 5.4 °C | 19.9 °C | 623.82 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 | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |