Hull, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.4 °F (low) to 64.1 °F (high). Annual precipitation averages 38.8 Inches. Hull 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 Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.8 °F | 36.2 °F | 1.93 in. |
| February | 23.3 °F | 41.5 °F | 2.01 in. |
| March | 32.5 °F | 52.4 °F | 2.67 in. |
| April | 43.6 °F | 64.5 °F | 4.1 in. |
| May | 54.1 °F | 75.0 °F | 4.85 in. |
| June | 63.7 °F | 84.1 °F | 4.5 in. |
| July | 67.5 °F | 87.9 °F | 4.0 in. |
| August | 65.6 °F | 86.7 °F | 3.5 in. |
| September | 57.3 °F | 79.2 °F | 3.45 in. |
| October | 46.0 °F | 67.2 °F | 3.04 in. |
| November | 34.5 °F | 53.2 °F | 2.7 in. |
| December | 24.8 °F | 41.1 °F | 2.09 in. |
| Annual | 44.4 °F | 64.1 °F | 38.84 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| 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 |