Danville, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.4 °F (low) to 62.4 °F (high). Annual precipitation averages 41.3 Inches. Danville 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 | 18.4 °F | 34.1 °F | 2.45 in. |
| February | 21.4 °F | 38.6 °F | 2.16 in. |
| March | 30.7 °F | 50.2 °F | 2.97 in. |
| April | 41.3 °F | 63.8 °F | 4.18 in. |
| May | 52.7 °F | 74.4 °F | 4.64 in. |
| June | 61.5 °F | 82.6 °F | 4.92 in. |
| July | 64.6 °F | 85.2 °F | 4.24 in. |
| August | 62.3 °F | 83.8 °F | 3.28 in. |
| September | 54.7 °F | 79.0 °F | 3.06 in. |
| October | 43.4 °F | 66.7 °F | 3.46 in. |
| November | 33.0 °F | 51.4 °F | 3.41 in. |
| December | 24.2 °F | 39.2 °F | 2.55 in. |
| Annual | 42.4 °F | 62.4 °F | 41.32 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 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |