Alma, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.1 °F (low) to 64.5 °F (high). Annual precipitation averages 41.6 Inches. 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.4 °F | 37.7 °F | 1.48 in. |
| February | 23.5 °F | 43.0 °F | 1.88 in. |
| March | 33.0 °F | 54.2 °F | 2.8 in. |
| April | 43.2 °F | 65.0 °F | 4.27 in. |
| May | 54.2 °F | 74.5 °F | 5.32 in. |
| June | 63.9 °F | 83.4 °F | 5.07 in. |
| July | 67.6 °F | 87.5 °F | 4.79 in. |
| August | 65.4 °F | 86.2 °F | 4.15 in. |
| September | 56.6 °F | 79.1 °F | 4.15 in. |
| October | 44.9 °F | 67.5 °F | 3.32 in. |
| November | 33.7 °F | 53.6 °F | 2.5 in. |
| December | 24.3 °F | 41.9 °F | 1.9 in. |
| Annual | 44.1 °F | 64.5 °F | 41.63 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |