Beecher, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5 °C (low) to 15.5 °C (high). Annual precipitation averages 1029.2 Millimeters. Beecher is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.6 °C | 0 °C | 58.67 mm |
| February | -7.1 °C | 2.2 °C | 53.09 mm |
| March | -1.9 °C | 8.4 °C | 60.2 mm |
| April | 3.9 °C | 15.6 °C | 95.76 mm |
| May | 10 °C | 21.6 °C | 114.05 mm |
| June | 15.5 °C | 27.1 °C | 121.67 mm |
| July | 18 °C | 29 °C | 116.08 mm |
| August | 17 °C | 28.1 °C | 107.44 mm |
| September | 12.7 °C | 24.6 °C | 86.36 mm |
| October | 6.1 °C | 17.4 °C | 89.15 mm |
| November | 0.2 °C | 9.7 °C | 69.85 mm |
| December | -5.6 °C | 2.8 °C | 56.9 mm |
| Annual | 5 °C | 15.5 °C | 1029.22 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |