Rock Creek, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.3 °C (low) to 11.8 °C (high). Annual precipitation averages 787.7 Millimeters. Rock Creek 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -17.1 °C | -5.8 °C | 18.03 mm |
| February | -15.1 °C | -2.8 °C | 20.83 mm |
| March | -8 °C | 4.2 °C | 39.12 mm |
| April | -0.9 °C | 12.1 °C | 70.87 mm |
| May | 6.1 °C | 19.4 °C | 96.77 mm |
| June | 11.9 °C | 24.7 °C | 114.55 mm |
| July | 14.3 °C | 27.1 °C | 105.41 mm |
| August | 12.8 °C | 26.1 °C | 99.06 mm |
| September | 8.2 °C | 21.6 °C | 81.53 mm |
| October | 1.6 °C | 13.6 °C | 74.17 mm |
| November | -5.3 °C | 4.5 °C | 40.39 mm |
| December | -12.5 °C | -2.9 °C | 26.92 mm |
| Annual | -0.3 °C | 11.8 °C | 787.65 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 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 |