Richburg, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.3 °C (low) to 13.6 °C (high). Annual precipitation averages 1109.2 Millimeters. Richburg is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.3 °C | -0.3 °C | 74.17 mm |
| February | -10.1 °C | 1.2 °C | 55.12 mm |
| March | -6.3 °C | 5.8 °C | 76.45 mm |
| April | -0.5 °C | 13.3 °C | 92.46 mm |
| May | 5.4 °C | 20.1 °C | 95 mm |
| June | 10.3 °C | 24.2 °C | 118.11 mm |
| July | 12.8 °C | 26.4 °C | 111.25 mm |
| August | 12.2 °C | 25.5 °C | 110.74 mm |
| September | 8.4 °C | 21.8 °C | 105.41 mm |
| October | 2.4 °C | 15.1 °C | 102.87 mm |
| November | -2.2 °C | 8.2 °C | 82.8 mm |
| December | -6.6 °C | 2.2 °C | 84.84 mm |
| Annual | 1.3 °C | 13.6 °C | 1109.22 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |