Little York, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.2 °F (low) to 60.9 °F (high). Annual precipitation averages 37.9 Inches. Little York is located in USDA Plant Hardiness Zone 5b. 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 | 15.0 °F | 31.6 °F | 1.61 in. |
| February | 18.5 °F | 36.2 °F | 1.78 in. |
| March | 29.3 °F | 48.9 °F | 2.47 in. |
| April | 40.0 °F | 62.0 °F | 3.74 in. |
| May | 52.0 °F | 72.5 °F | 5.0 in. |
| June | 61.7 °F | 81.9 °F | 4.77 in. |
| July | 65.0 °F | 85.2 °F | 3.92 in. |
| August | 62.9 °F | 83.4 °F | 3.77 in. |
| September | 54.6 °F | 77.4 °F | 3.76 in. |
| October | 42.8 °F | 64.8 °F | 2.81 in. |
| November | 31.2 °F | 49.7 °F | 2.36 in. |
| December | 21.1 °F | 36.9 °F | 1.91 in. |
| Annual | 41.2 °F | 60.9 °F | 37.9 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |