Oxford, Connecticut has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.6 °C (low) to 15.1 °C (high). Annual precipitation averages 1327.7 Millimeters. Oxford is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.6 °C | 1.8 °C | 101.09 mm |
| February | -6.8 °C | 3.2 °C | 83.57 mm |
| March | -2.7 °C | 7.6 °C | 117.35 mm |
| April | 3.1 °C | 14.3 °C | 109.22 mm |
| May | 8.6 °C | 20.4 °C | 105.16 mm |
| June | 13.8 °C | 25 °C | 119.38 mm |
| July | 16.7 °C | 27.7 °C | 112.27 mm |
| August | 15.9 °C | 26.8 °C | 111.76 mm |
| September | 12.1 °C | 22.8 °C | 115.06 mm |
| October | 5.7 °C | 16.4 °C | 130.81 mm |
| November | 0.4 °C | 10.4 °C | 107.7 mm |
| December | -4.3 °C | 4.4 °C | 114.3 mm |
| Annual | 4.6 °C | 15.1 °C | 1327.67 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |