Richford, Vermont has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.2 °C (low) to 12.2 °C (high). Annual precipitation averages 1260.3 Millimeters. Richford is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.1 °C | -3.4 °C | 95.76 mm |
| February | -13.2 °C | -1.9 °C | 75.18 mm |
| March | -7.3 °C | 3.3 °C | 84.33 mm |
| April | 0.1 °C | 11.4 °C | 95.5 mm |
| May | 6.8 °C | 19.2 °C | 109.73 mm |
| June | 11.8 °C | 23.9 °C | 112.52 mm |
| July | 14.4 °C | 26.2 °C | 138.68 mm |
| August | 13.5 °C | 25.4 °C | 120.9 mm |
| September | 9.4 °C | 21.4 °C | 108.46 mm |
| October | 3.6 °C | 14 °C | 123.7 mm |
| November | -2.2 °C | 6.9 °C | 91.95 mm |
| December | -8.9 °C | 0.2 °C | 103.63 mm |
| Annual | 1.2 °C | 12.2 °C | 1260.34 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |