Elgin, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2 °C (low) to 12.5 °C (high). Annual precipitation averages 894.3 Millimeters. Elgin 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.1 °C | -4.9 °C | 26.16 mm |
| February | -12.1 °C | -2.4 °C | 25.65 mm |
| March | -5.2 °C | 4.6 °C | 50.04 mm |
| April | 1.6 °C | 12.8 °C | 90.17 mm |
| May | 8.3 °C | 19.8 °C | 113.54 mm |
| June | 14.1 °C | 25.3 °C | 135.64 mm |
| July | 16.2 °C | 27.2 °C | 110.49 mm |
| August | 14.8 °C | 26 °C | 112.78 mm |
| September | 10.3 °C | 22.3 °C | 93.98 mm |
| October | 3.3 °C | 14.7 °C | 61.47 mm |
| November | -3.4 °C | 5.7 °C | 44.7 mm |
| December | -10 °C | -1.7 °C | 29.72 mm |
| Annual | 2 °C | 12.5 °C | 894.34 mm |
| 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 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |