Esko, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1 °C (low) to 10 °C (high). Annual precipitation averages 815.6 Millimeters. Esko is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -17.1 °C | -6.9 °C | 23.88 mm |
| February | -15.2 °C | -4 °C | 23.11 mm |
| March | -8.8 °C | 2.4 °C | 35.31 mm |
| April | -1.9 °C | 9.3 °C | 65.53 mm |
| May | 4.1 °C | 17 °C | 89.15 mm |
| June | 9.4 °C | 22.2 °C | 118.11 mm |
| July | 13.1 °C | 25.3 °C | 110.49 mm |
| August | 12.4 °C | 24.5 °C | 97.54 mm |
| September | 8.1 °C | 19.8 °C | 90.93 mm |
| October | 1.7 °C | 11.7 °C | 78.74 mm |
| November | -5.3 °C | 3.1 °C | 46.99 mm |
| December | -12.6 °C | -4.1 °C | 35.81 mm |
| Annual | -1 °C | 10 °C | 815.59 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°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 |