Morris, Connecticut has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.5 °C (low) to 14.4 °C (high). Annual precipitation averages 1320.8 Millimeters. Morris is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9 °C | 0.9 °C | 89.41 mm |
| February | -8.1 °C | 2.4 °C | 77.72 mm |
| March | -4.1 °C | 6.8 °C | 109.47 mm |
| April | 1.8 °C | 14.1 °C | 99.82 mm |
| May | 7.7 °C | 20 °C | 105.66 mm |
| June | 12.8 °C | 24.5 °C | 118.62 mm |
| July | 15.8 °C | 27.1 °C | 121.16 mm |
| August | 15.1 °C | 26.2 °C | 123.7 mm |
| September | 11.2 °C | 22.2 °C | 121.67 mm |
| October | 4.8 °C | 15.7 °C | 136.65 mm |
| November | -0.6 °C | 9.6 °C | 100.84 mm |
| December | -5.6 °C | 3.4 °C | 116.08 mm |
| Annual | 3.5 °C | 14.4 °C | 1320.8 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |