Prior Lake, Minnesota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.2 °C (low) to 12.7 °C (high). Annual precipitation averages 841.5 Millimeters. Prior Lake is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.3 °C | -4.9 °C | 22.61 mm |
| February | -12.4 °C | -2.4 °C | 23.37 mm |
| March | -5.6 °C | 4.6 °C | 43.94 mm |
| April | 1.9 °C | 13.2 °C | 74.93 mm |
| May | 8.9 °C | 20.3 °C | 110.49 mm |
| June | 14.7 °C | 25.6 °C | 127.51 mm |
| July | 16.9 °C | 27.9 °C | 104.65 mm |
| August | 15.5 °C | 26.8 °C | 116.08 mm |
| September | 10.9 °C | 22.9 °C | 80.77 mm |
| October | 3.7 °C | 14.8 °C | 65.02 mm |
| November | -3.5 °C | 5.6 °C | 41.91 mm |
| December | -10.6 °C | -2.1 °C | 30.23 mm |
| Annual | 2.2 °C | 12.7 °C | 841.51 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°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 |