Eldora, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.2 °F (low) to 57.6 °F (high). Annual precipitation averages 36.9 Inches. Eldora 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.4 °F | 26.5 °F | 0.96 in. |
| February | 13.4 °F | 31.3 °F | 1.14 in. |
| March | 25.0 °F | 44.4 °F | 2.1 in. |
| April | 36.2 °F | 58.9 °F | 3.85 in. |
| May | 48.8 °F | 70.4 °F | 5.07 in. |
| June | 59.4 °F | 80.2 °F | 5.79 in. |
| July | 62.6 °F | 83.3 °F | 4.24 in. |
| August | 59.9 °F | 81.2 °F | 4.21 in. |
| September | 51.0 °F | 75.3 °F | 3.42 in. |
| October | 38.8 °F | 61.9 °F | 2.68 in. |
| November | 26.5 °F | 45.5 °F | 1.89 in. |
| December | 15.7 °F | 32.1 °F | 1.52 in. |
| Annual | 37.2 °F | 57.6 °F | 36.87 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 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 | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |