Richland, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.6 °C (low) to 13.6 °C (high). Annual precipitation averages 1239.5 Millimeters. Richland is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.6 °C | -0.4 °C | 124.97 mm |
| February | -9.1 °C | 0.6 °C | 91.95 mm |
| March | -4.8 °C | 5.1 °C | 80.77 mm |
| April | 1.3 °C | 12.8 °C | 90.93 mm |
| May | 7.7 °C | 19.8 °C | 92.2 mm |
| June | 12.9 °C | 24.3 °C | 95.5 mm |
| July | 16.2 °C | 26.6 °C | 88.65 mm |
| August | 15.5 °C | 25.9 °C | 99.06 mm |
| September | 11.6 °C | 22.4 °C | 105.92 mm |
| October | 5.8 °C | 15.4 °C | 129.03 mm |
| November | 0.3 °C | 8.6 °C | 114.81 mm |
| December | -5.1 °C | 2.5 °C | 125.73 mm |
| Annual | 3.6 °C | 13.6 °C | 1239.52 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 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 |