Sandstone, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 30.6 °F (low) to 52.2 °F (high). Annual precipitation averages 32.2 Inches. 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 | 0.5 °F | 20.6 °F | 0.82 in. |
| February | 4.4 °F | 26.1 °F | 0.83 in. |
| March | 16.9 °F | 38.3 °F | 1.52 in. |
| April | 29.6 °F | 52.6 °F | 2.76 in. |
| May | 41.5 °F | 66.2 °F | 3.73 in. |
| June | 51.6 °F | 75.3 °F | 4.43 in. |
| July | 56.6 °F | 79.8 °F | 4.63 in. |
| August | 54.3 °F | 77.8 °F | 4.1 in. |
| September | 46.0 °F | 69.8 °F | 3.51 in. |
| October | 34.4 °F | 55.3 °F | 3.06 in. |
| November | 22.3 °F | 39.1 °F | 1.62 in. |
| December | 9.2 °F | 25.8 °F | 1.18 in. |
| Annual | 30.6 °F | 52.2 °F | 32.19 in. |
| 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 : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |