Regal, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.7 °C (low) to 11.6 °C (high). Annual precipitation averages 744.5 Millimeters. Regal is located in USDA Plant Hardiness Zone 4b. 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 | -16.3 °C | -6.4 °C | 19.05 mm |
| February | -14.5 °C | -3.7 °C | 20.32 mm |
| March | -7.3 °C | 3.2 °C | 38.35 mm |
| April | 0.3 °C | 12 °C | 64.52 mm |
| May | 7.5 °C | 19.4 °C | 85.6 mm |
| June | 13.5 °C | 24.9 °C | 115.57 mm |
| July | 16 °C | 27.3 °C | 108.46 mm |
| August | 14.4 °C | 26.1 °C | 98.55 mm |
| September | 9.6 °C | 21.9 °C | 72.9 mm |
| October | 2.3 °C | 13.6 °C | 63.5 mm |
| November | -5 °C | 4.2 °C | 33.78 mm |
| December | -12.2 °C | -3.4 °C | 23.88 mm |
| Annual | 0.7 °C | 11.6 °C | 744.48 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 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 | Dfb - Humid Continental Mild Summer, Wet All Year |