Bone Gap, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45.8 °F (low) to 66.4 °F (high). Annual precipitation averages 46.4 Inches. Bone Gap 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 | 23.5 °F | 39.6 °F | 3.42 in. |
| February | 26.3 °F | 44.9 °F | 2.8 in. |
| March | 34.7 °F | 55.2 °F | 3.96 in. |
| April | 45.0 °F | 67.4 °F | 5.33 in. |
| May | 55.7 °F | 77.1 °F | 4.78 in. |
| June | 64.7 °F | 85.5 °F | 4.84 in. |
| July | 67.4 °F | 88.6 °F | 4.02 in. |
| August | 65.4 °F | 87.5 °F | 3.25 in. |
| September | 57.6 °F | 81.9 °F | 3.21 in. |
| October | 46.0 °F | 70.2 °F | 3.51 in. |
| November | 35.4 °F | 55.3 °F | 3.91 in. |
| December | 27.4 °F | 43.9 °F | 3.38 in. |
| Annual | 45.8 °F | 66.4 °F | 46.41 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |