Sandstone, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.8 °C (low) to 11.2 °C (high). Annual precipitation averages 817.6 Millimeters. Sandstone is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -17.5 °C | -6.3 °C | 20.83 mm |
| February | -15.3 °C | -3.3 °C | 21.08 mm |
| March | -8.4 °C | 3.5 °C | 38.61 mm |
| April | -1.3 °C | 11.4 °C | 70.1 mm |
| May | 5.3 °C | 19 °C | 94.74 mm |
| June | 10.9 °C | 24.1 °C | 112.52 mm |
| July | 13.7 °C | 26.6 °C | 117.6 mm |
| August | 12.4 °C | 25.4 °C | 104.14 mm |
| September | 7.8 °C | 21 °C | 89.15 mm |
| October | 1.3 °C | 12.9 °C | 77.72 mm |
| November | -5.4 °C | 3.9 °C | 41.15 mm |
| December | -12.7 °C | -3.4 °C | 29.97 mm |
| Annual | -0.8 °C | 11.2 °C | 817.61 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |