Stratford, Connecticut has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.1 °C (low) to 16 °C (high). Annual precipitation averages 1238.3 Millimeters. Stratford is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.8 °C | 3.7 °C | 90.17 mm |
| February | -4.1 °C | 4.7 °C | 78.74 mm |
| March | -0.3 °C | 8.6 °C | 114.05 mm |
| April | 5.1 °C | 14.4 °C | 109.73 mm |
| May | 10.5 °C | 19.8 °C | 97.03 mm |
| June | 15.8 °C | 24.9 °C | 111.51 mm |
| July | 19.3 °C | 28.1 °C | 88.39 mm |
| August | 18.8 °C | 27.2 °C | 104.65 mm |
| September | 14.8 °C | 24 °C | 112.27 mm |
| October | 8.6 °C | 17.8 °C | 122.68 mm |
| November | 2.9 °C | 11.9 °C | 99.57 mm |
| December | -1.4 °C | 6.5 °C | 109.47 mm |
| Annual | 7.1 °C | 16 °C | 1238.26 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |