Eliza, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.9 °F (low) to 60.2 °F (high). Annual precipitation averages 37.1 Inches. Eliza is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.5 °F | 30.7 °F | 1.38 in. |
| February | 17.9 °F | 35.1 °F | 1.66 in. |
| March | 28.7 °F | 48.1 °F | 2.4 in. |
| April | 39.8 °F | 61.4 °F | 3.58 in. |
| May | 51.6 °F | 72.2 °F | 4.87 in. |
| June | 61.4 °F | 81.5 °F | 4.99 in. |
| July | 65.0 °F | 84.9 °F | 3.87 in. |
| August | 62.8 °F | 82.9 °F | 3.97 in. |
| September | 54.5 °F | 76.9 °F | 3.53 in. |
| October | 42.7 °F | 63.9 °F | 2.77 in. |
| November | 30.9 °F | 49.0 °F | 2.22 in. |
| December | 20.5 °F | 35.9 °F | 1.85 in. |
| Annual | 40.9 °F | 60.2 °F | 37.09 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |