Stamford, Connecticut has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45.2 °F (low) to 61.4 °F (high). Annual precipitation averages 50 Inches. Stamford 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 Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 24.2 °F | 38.8 °F | 4.01 in. |
| February | 24.7 °F | 40.6 °F | 2.98 in. |
| March | 31.6 °F | 47.2 °F | 4.22 in. |
| April | 41.4 °F | 59.1 °F | 4.06 in. |
| May | 51.0 °F | 68.9 °F | 3.82 in. |
| June | 60.8 °F | 78.0 °F | 4.67 in. |
| July | 66.6 °F | 83.8 °F | 3.84 in. |
| August | 65.8 °F | 81.7 °F | 4.56 in. |
| September | 58.5 °F | 76.0 °F | 4.77 in. |
| October | 48.4 °F | 64.4 °F | 4.49 in. |
| November | 38.5 °F | 53.7 °F | 4.01 in. |
| December | 30.5 °F | 44.1 °F | 4.56 in. |
| Annual | 45.2 °F | 61.4 °F | 49.99 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |