Grand Meadow, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.5 °C (low) to 11.9 °C (high). Annual precipitation averages 905.3 Millimeters. Grand Meadow 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 | -14.4 °C | -5.6 °C | 25.4 mm |
| February | -12.3 °C | -3.1 °C | 23.37 mm |
| March | -5.8 °C | 3.8 °C | 43.69 mm |
| April | 1.1 °C | 12.2 °C | 94.23 mm |
| May | 8 °C | 19.3 °C | 121.92 mm |
| June | 13.9 °C | 24.8 °C | 141.48 mm |
| July | 15.7 °C | 26.6 °C | 113.03 mm |
| August | 14.3 °C | 25.4 °C | 109.47 mm |
| September | 9.7 °C | 21.9 °C | 93.22 mm |
| October | 2.8 °C | 14.2 °C | 68.07 mm |
| November | -4.1 °C | 5.2 °C | 38.86 mm |
| December | -10.6 °C | -2.4 °C | 32.51 mm |
| Annual | 1.5 °C | 11.9 °C | 905.25 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 |