Rushmore, Minnesota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1.9 °C (low) to 12.9 °C (high). Annual precipitation averages 774.7 Millimeters. Rushmore is located in USDA Plant Hardiness Zone 5a. 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 | -14.2 °C | -4.8 °C | 18.54 mm |
| February | -12.1 °C | -2.4 °C | 21.59 mm |
| March | -5.8 °C | 4.6 °C | 39.12 mm |
| April | 1.1 °C | 13.3 °C | 79.5 mm |
| May | 8.4 °C | 20.5 °C | 102.87 mm |
| June | 14.7 °C | 26.1 °C | 122.94 mm |
| July | 16.7 °C | 28.2 °C | 89.92 mm |
| August | 15.4 °C | 26.9 °C | 88.39 mm |
| September | 10.6 °C | 23.2 °C | 84.58 mm |
| October | 3 °C | 15.3 °C | 64.52 mm |
| November | -4.4 °C | 5.6 °C | 36.83 mm |
| December | -10.9 °C | -2.2 °C | 25.91 mm |
| Annual | 1.9 °C | 12.9 °C | 774.71 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 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |