Elk River, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.6 °C (low) to 12.5 °C (high). Annual precipitation averages 810.3 Millimeters. Elk River 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 | -15 °C | -5.2 °C | 19.56 mm |
| February | -13.2 °C | -2.5 °C | 21.08 mm |
| March | -6.3 °C | 4.7 °C | 39.12 mm |
| April | 0.9 °C | 12.9 °C | 72.64 mm |
| May | 8.1 °C | 20.3 °C | 107.95 mm |
| June | 13.9 °C | 25.6 °C | 113.28 mm |
| July | 16.5 °C | 28.2 °C | 109.22 mm |
| August | 14.9 °C | 26.7 °C | 102.36 mm |
| September | 10.3 °C | 22.3 °C | 87.63 mm |
| October | 3.2 °C | 14 °C | 69.34 mm |
| November | -3.8 °C | 5.4 °C | 40.39 mm |
| December | -10.9 °C | -2.3 °C | 27.69 mm |
| Annual | 1.6 °C | 12.5 °C | 810.26 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 |