Beardstown, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.9 °F (low) to 63.4 °F (high). Annual precipitation averages 37.5 Inches. Beardstown 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 | 17.2 °F | 34.9 °F | 1.99 in. |
| February | 20.7 °F | 39.7 °F | 1.71 in. |
| March | 30.4 °F | 51.8 °F | 2.33 in. |
| April | 40.7 °F | 64.7 °F | 3.73 in. |
| May | 52.5 °F | 74.8 °F | 4.62 in. |
| June | 61.9 °F | 83.4 °F | 4.44 in. |
| July | 65.1 °F | 86.8 °F | 3.71 in. |
| August | 62.6 °F | 85.5 °F | 3.53 in. |
| September | 54.3 °F | 79.8 °F | 3.31 in. |
| October | 42.2 °F | 67.2 °F | 3.05 in. |
| November | 31.8 °F | 52.4 °F | 3.01 in. |
| December | 23.1 °F | 40.3 °F | 2.09 in. |
| Annual | 41.9 °F | 63.4 °F | 37.52 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 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |