Eldred, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.5 °F (low) to 64.2 °F (high). Annual precipitation averages 40.9 Inches. Eldred is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.7 °F | 36.8 °F | 2.32 in. |
| February | 23.1 °F | 42.0 °F | 2.18 in. |
| March | 32.0 °F | 53.1 °F | 3.07 in. |
| April | 42.6 °F | 65.4 °F | 4.36 in. |
| May | 53.8 °F | 74.9 °F | 4.89 in. |
| June | 63.0 °F | 83.5 °F | 4.53 in. |
| July | 66.4 °F | 86.8 °F | 3.9 in. |
| August | 64.1 °F | 85.8 °F | 3.44 in. |
| September | 55.6 °F | 79.7 °F | 3.39 in. |
| October | 44.1 °F | 67.6 °F | 3.12 in. |
| November | 33.5 °F | 53.4 °F | 3.24 in. |
| December | 24.5 °F | 41.5 °F | 2.45 in. |
| Annual | 43.5 °F | 64.2 °F | 40.89 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |