Slayton, Minnesota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1.5 °C (low) to 12.3 °C (high). Annual precipitation averages 769.1 Millimeters. Slayton is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.4 °C | -5 °C | 19.81 mm |
| February | -12.2 °C | -2.6 °C | 24.13 mm |
| March | -5.9 °C | 4.1 °C | 40.13 mm |
| April | 0.7 °C | 12.4 °C | 79.5 mm |
| May | 8 °C | 19.7 °C | 98.3 mm |
| June | 14.3 °C | 25.5 °C | 121.41 mm |
| July | 16.2 °C | 27.5 °C | 88.9 mm |
| August | 14.7 °C | 26.2 °C | 85.85 mm |
| September | 10 °C | 22.4 °C | 89.15 mm |
| October | 2.6 °C | 14.6 °C | 58.93 mm |
| November | -4.7 °C | 5.3 °C | 33.78 mm |
| December | -11 °C | -2.3 °C | 29.21 mm |
| Annual | 1.5 °C | 12.3 °C | 769.1 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 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 |