Alma, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.8 °C (low) to 13.5 °C (high). Annual precipitation averages 928.4 Millimeters. Alma is located in USDA Plant Hardiness Zone 5a. 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 | -13.3 °C | -3.7 °C | 24.89 mm |
| February | -11.3 °C | -1 °C | 26.42 mm |
| March | -4.6 °C | 5.9 °C | 47.24 mm |
| April | 2.3 °C | 14 °C | 88.65 mm |
| May | 9 °C | 20.8 °C | 119.63 mm |
| June | 14.7 °C | 26.1 °C | 140.72 mm |
| July | 17 °C | 28.2 °C | 114.05 mm |
| August | 15.8 °C | 27.1 °C | 123.19 mm |
| September | 11.4 °C | 22.9 °C | 102.11 mm |
| October | 4.4 °C | 15.4 °C | 65.28 mm |
| November | -2.4 °C | 6.6 °C | 46.48 mm |
| December | -9.2 °C | -0.7 °C | 29.72 mm |
| Annual | 2.8 °C | 13.5 °C | 928.38 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 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |