Ely, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 27 °F (low) to 48.6 °F (high). Annual precipitation averages 29.1 Inches. Ely is located in USDA Plant Hardiness Zone 3b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.9 °F | 16.3 °F | 1.06 in. |
| February | -2.1 °F | 22.3 °F | 0.78 in. |
| March | 10.9 °F | 35.6 °F | 1.12 in. |
| April | 25.1 °F | 48.8 °F | 2.04 in. |
| May | 38.6 °F | 62.7 °F | 3.08 in. |
| June | 49.4 °F | 72.3 °F | 3.98 in. |
| July | 54.0 °F | 77.0 °F | 4.13 in. |
| August | 52.0 °F | 75.4 °F | 3.41 in. |
| September | 44.3 °F | 66.2 °F | 3.61 in. |
| October | 32.6 °F | 50.5 °F | 2.88 in. |
| November | 19.1 °F | 34.4 °F | 1.68 in. |
| December | 4.7 °F | 21.7 °F | 1.31 in. |
| Annual | 27 °F | 48.6 °F | 29.08 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 3b : -35°F to -30°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |