Beacon Falls, Connecticut has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.8 °C (low) to 15.7 °C (high). Annual precipitation averages 1320.6 Millimeters. Beacon Falls is located in USDA Plant Hardiness Zone 6b. 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 | -7.2 °C | 2.4 °C | 99.82 mm |
| February | -6.5 °C | 3.9 °C | 85.34 mm |
| March | -2.5 °C | 8.2 °C | 117.86 mm |
| April | 3.2 °C | 14.7 °C | 108.97 mm |
| May | 8.8 °C | 20.9 °C | 106.17 mm |
| June | 14 °C | 25.4 °C | 114.81 mm |
| July | 17.1 °C | 28.4 °C | 108.2 mm |
| August | 16.2 °C | 27.4 °C | 107.95 mm |
| September | 12.2 °C | 23.6 °C | 117.6 mm |
| October | 5.7 °C | 17.1 °C | 133.1 mm |
| November | 0.4 °C | 10.9 °C | 105.16 mm |
| December | -4 °C | 5.2 °C | 115.57 mm |
| Annual | 4.8 °C | 15.7 °C | 1320.55 mm |
| 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 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |