Ely, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.9 °F (low) to 59 °F (high). Annual precipitation averages 38.4 Inches. Ely is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.9 °F | 28.7 °F | 1.23 in. |
| February | 15.7 °F | 33.2 °F | 1.45 in. |
| March | 26.8 °F | 46.5 °F | 2.2 in. |
| April | 38.0 °F | 60.6 °F | 3.82 in. |
| May | 50.0 °F | 71.5 °F | 4.62 in. |
| June | 60.3 °F | 80.8 °F | 5.5 in. |
| July | 63.6 °F | 83.9 °F | 4.59 in. |
| August | 61.1 °F | 82.1 °F | 4.31 in. |
| September | 52.4 °F | 76.1 °F | 3.74 in. |
| October | 40.5 °F | 63.0 °F | 2.97 in. |
| November | 28.4 °F | 47.6 °F | 2.25 in. |
| December | 18.1 °F | 34.3 °F | 1.71 in. |
| Annual | 38.9 °F | 59 °F | 38.39 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |