Ursa, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.3 °F (low) to 62.9 °F (high). Annual precipitation averages 39.7 Inches. Ursa 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.1 °F | 34.7 °F | 1.77 in. |
| February | 21.7 °F | 39.5 °F | 1.98 in. |
| March | 31.4 °F | 51.4 °F | 2.56 in. |
| April | 42.4 °F | 64.0 °F | 4.05 in. |
| May | 53.7 °F | 73.8 °F | 5.13 in. |
| June | 63.3 °F | 82.9 °F | 4.78 in. |
| July | 66.8 °F | 86.8 °F | 4.0 in. |
| August | 64.6 °F | 85.2 °F | 3.92 in. |
| September | 56.2 °F | 78.7 °F | 3.58 in. |
| October | 44.7 °F | 66.2 °F | 3.26 in. |
| November | 33.2 °F | 51.9 °F | 2.67 in. |
| December | 23.4 °F | 39.4 °F | 1.98 in. |
| Annual | 43.3 °F | 62.9 °F | 39.68 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 |