Clarence, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.1 °C (low) to 13.9 °C (high). Annual precipitation averages 1033.3 Millimeters. Clarence is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8 °C | 0.1 °C | 80.01 mm |
| February | -7.8 °C | 0.9 °C | 60.71 mm |
| March | -4.1 °C | 5.5 °C | 75.18 mm |
| April | 1.9 °C | 12.8 °C | 85.09 mm |
| May | 8.2 °C | 19.7 °C | 84.84 mm |
| June | 13.6 °C | 24.3 °C | 96.01 mm |
| July | 16.2 °C | 26.7 °C | 87.12 mm |
| August | 15.5 °C | 26.2 °C | 84.07 mm |
| September | 11.6 °C | 22.6 °C | 105.16 mm |
| October | 5.7 °C | 15.6 °C | 100.08 mm |
| November | 0.4 °C | 8.8 °C | 89.92 mm |
| December | -4.3 °C | 3 °C | 85.09 mm |
| Annual | 4.1 °C | 13.9 °C | 1033.28 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |