Ripley, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.5 °F (low) to 63.1 °F (high). Annual precipitation averages 39 Inches. Ripley is located in USDA Plant Hardiness Zone 6a. 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 | 18.3 °F | 35.0 °F | 1.97 in. |
| February | 21.8 °F | 40.0 °F | 1.93 in. |
| March | 31.2 °F | 51.7 °F | 2.51 in. |
| April | 41.6 °F | 64.2 °F | 3.94 in. |
| May | 52.6 °F | 74.1 °F | 4.94 in. |
| June | 62.0 °F | 82.8 °F | 4.68 in. |
| July | 65.4 °F | 86.3 °F | 3.84 in. |
| August | 62.6 °F | 85.0 °F | 3.62 in. |
| September | 54.6 °F | 79.2 °F | 3.52 in. |
| October | 43.0 °F | 66.7 °F | 3.15 in. |
| November | 32.5 °F | 52.5 °F | 2.81 in. |
| December | 23.8 °F | 40.0 °F | 2.13 in. |
| Annual | 42.5 °F | 63.1 °F | 39.04 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 6a : -10°F to -5°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 |