Bridgewater, Connecticut has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.2 °C (low) to 15.1 °C (high). Annual precipitation averages 1266.2 Millimeters. Bridgewater is located in USDA Plant Hardiness Zone 6b. 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 | -8.1 °C | 1.7 °C | 89.66 mm |
| February | -7.2 °C | 3.3 °C | 73.15 mm |
| March | -3.2 °C | 7.7 °C | 100.33 mm |
| April | 2.8 °C | 14.7 °C | 98.81 mm |
| May | 8.4 °C | 20.6 °C | 98.81 mm |
| June | 13.4 °C | 25.1 °C | 115.32 mm |
| July | 16.4 °C | 27.7 °C | 120.14 mm |
| August | 15.7 °C | 26.7 °C | 121.67 mm |
| September | 11.7 °C | 22.8 °C | 115.82 mm |
| October | 5.2 °C | 16.6 °C | 126.24 mm |
| November | -0.1 °C | 10.3 °C | 98.55 mm |
| December | -4.7 °C | 4.3 °C | 107.7 mm |
| Annual | 4.2 °C | 15.1 °C | 1266.2 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |