Alma, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.3 °C (low) to 19 °C (high). Annual precipitation averages 906.8 Millimeters. Alma 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.5 °C | 4.3 °C | 19.05 mm |
| February | -5.7 °C | 7 °C | 28.7 mm |
| March | -0.2 °C | 13.3 °C | 53.09 mm |
| April | 5.6 °C | 19.2 °C | 92.96 mm |
| May | 11.9 °C | 24.1 °C | 129.54 mm |
| June | 17.6 °C | 29.4 °C | 130.81 mm |
| July | 20.1 °C | 32.2 °C | 116.33 mm |
| August | 18.7 °C | 31.4 °C | 111.25 mm |
| September | 13.7 °C | 27.1 °C | 83.06 mm |
| October | 6.6 °C | 20.5 °C | 68.33 mm |
| November | 0 °C | 12.8 °C | 41.4 mm |
| December | -5.6 °C | 6.1 °C | 32.26 mm |
| Annual | 6.3 °C | 19 °C | 906.78 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 |