Storrs, Connecticut has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.8 °C (low) to 14.9 °C (high). Annual precipitation averages 1248.9 Millimeters. Storrs 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 | -8.2 °C | 1.7 °C | 91.44 mm |
| February | -7.7 °C | 3.1 °C | 79.25 mm |
| March | -3.4 °C | 7.4 °C | 110.49 mm |
| April | 2.2 °C | 14.1 °C | 109.98 mm |
| May | 7.7 °C | 19.9 °C | 90.42 mm |
| June | 12.9 °C | 24.4 °C | 109.73 mm |
| July | 16 °C | 27.3 °C | 101.35 mm |
| August | 15 °C | 26.4 °C | 107.95 mm |
| September | 11.1 °C | 22.7 °C | 112.27 mm |
| October | 4.8 °C | 16.3 °C | 123.44 mm |
| November | -0.2 °C | 10.4 °C | 99.57 mm |
| December | -4.6 °C | 4.8 °C | 113.03 mm |
| Annual | 3.8 °C | 14.9 °C | 1248.92 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 | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |