Strafford, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.1 °C (low) to 11.3 °C (high). Annual precipitation averages 1173.2 Millimeters. Strafford is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.1 °C | -3.7 °C | 81.53 mm |
| February | -13.4 °C | -1.9 °C | 67.31 mm |
| March | -8.4 °C | 2.8 °C | 82.8 mm |
| April | -1.3 °C | 10.7 °C | 92.2 mm |
| May | 5.3 °C | 17.9 °C | 98.3 mm |
| June | 10.2 °C | 22.4 °C | 117.6 mm |
| July | 12.8 °C | 24.9 °C | 117.86 mm |
| August | 11.8 °C | 24.2 °C | 108.2 mm |
| September | 7.7 °C | 20.2 °C | 91.44 mm |
| October | 1.8 °C | 12.9 °C | 125.48 mm |
| November | -3.6 °C | 5.6 °C | 89.66 mm |
| December | -9.7 °C | -0.7 °C | 100.84 mm |
| Annual | -0.1 °C | 11.3 °C | 1173.22 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |