Medora, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.7 °F (low) to 64.2 °F (high). Annual precipitation averages 40.6 Inches. Medora 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.9 °F | 36.9 °F | 2.45 in. |
| February | 24.1 °F | 42.4 °F | 2.12 in. |
| March | 33.4 °F | 53.2 °F | 3.19 in. |
| April | 43.8 °F | 65.3 °F | 4.53 in. |
| May | 55.0 °F | 74.9 °F | 5.14 in. |
| June | 64.0 °F | 83.5 °F | 3.76 in. |
| July | 67.1 °F | 86.5 °F | 3.48 in. |
| August | 65.2 °F | 85.6 °F | 3.63 in. |
| September | 56.5 °F | 79.6 °F | 3.3 in. |
| October | 45.3 °F | 67.8 °F | 3.27 in. |
| November | 34.8 °F | 53.4 °F | 3.17 in. |
| December | 25.8 °F | 41.8 °F | 2.6 in. |
| Annual | 44.7 °F | 64.2 °F | 40.64 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 |