Burlington, Connecticut has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.6 °C (low) to 14.7 °C (high). Annual precipitation averages 1350.3 Millimeters. Burlington 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.6 °C | 0.9 °C | 93.98 mm |
| February | -7.7 °C | 2.6 °C | 86.11 mm |
| March | -3.7 °C | 6.9 °C | 116.33 mm |
| April | 1.8 °C | 14.3 °C | 102.87 mm |
| May | 7.8 °C | 20.4 °C | 105.16 mm |
| June | 12.9 °C | 25 °C | 120.65 mm |
| July | 16 °C | 27.7 °C | 118.36 mm |
| August | 15.2 °C | 26.6 °C | 116.33 mm |
| September | 11.3 °C | 22.7 °C | 128.52 mm |
| October | 4.7 °C | 16.1 °C | 141.22 mm |
| November | -0.6 °C | 9.5 °C | 103.12 mm |
| December | -5.4 °C | 3.7 °C | 117.6 mm |
| Annual | 3.6 °C | 14.7 °C | 1350.25 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |