West Salem, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.6 °C (low) to 13.7 °C (high). Annual precipitation averages 932.7 Millimeters. West Salem 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 °C | -3.3 °C | 29.21 mm |
| February | -11.2 °C | -0.6 °C | 28.96 mm |
| March | -4.7 °C | 6.2 °C | 50.04 mm |
| April | 2.1 °C | 14.1 °C | 99.31 mm |
| May | 8.7 °C | 21 °C | 120.4 mm |
| June | 14.3 °C | 26.2 °C | 134.37 mm |
| July | 16.6 °C | 28.2 °C | 108.71 mm |
| August | 15.3 °C | 27.2 °C | 107.7 mm |
| September | 10.7 °C | 23.1 °C | 98.3 mm |
| October | 3.9 °C | 15.6 °C | 70.36 mm |
| November | -2.5 °C | 6.8 °C | 48.26 mm |
| December | -8.9 °C | -0.4 °C | 37.08 mm |
| Annual | 2.6 °C | 13.7 °C | 932.7 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |