Westland, Michigan has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.7 °C (low) to 15.5 °C (high). Annual precipitation averages 870.7 Millimeters. Westland 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 | -7.7 °C | 0.3 °C | 59.69 mm |
| February | -7.1 °C | 2.1 °C | 50.8 mm |
| March | -2.7 °C | 7.8 °C | 60.96 mm |
| April | 3.1 °C | 15.1 °C | 79.25 mm |
| May | 9.2 °C | 21.8 °C | 93.98 mm |
| June | 14.8 °C | 26.9 °C | 85.09 mm |
| July | 17 °C | 29.2 °C | 83.06 mm |
| August | 16.3 °C | 28.2 °C | 83.06 mm |
| September | 12.1 °C | 24.5 °C | 79.25 mm |
| October | 5.7 °C | 17.3 °C | 72.14 mm |
| November | 0.3 °C | 9.6 °C | 65.28 mm |
| December | -4.2 °C | 3.2 °C | 58.17 mm |
| Annual | 4.7 °C | 15.5 °C | 870.73 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 |