Clarkson, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 40.6 °F (low) to 57.6 °F (high). Annual precipitation averages 31.4 Inches. Clarkson is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.8 °F | 33.1 °F | 2.11 in. |
| February | 19.0 °F | 34.3 °F | 1.66 in. |
| March | 26.3 °F | 42.1 °F | 2.29 in. |
| April | 36.6 °F | 55.7 °F | 2.85 in. |
| May | 47.5 °F | 67.9 °F | 2.94 in. |
| June | 57.5 °F | 76.7 °F | 3.02 in. |
| July | 62.5 °F | 80.8 °F | 3.02 in. |
| August | 61.3 °F | 79.5 °F | 2.67 in. |
| September | 54.3 °F | 73.1 °F | 2.98 in. |
| October | 43.8 °F | 60.8 °F | 3.15 in. |
| November | 33.8 °F | 48.8 °F | 2.37 in. |
| December | 25.4 °F | 38.4 °F | 2.35 in. |
| Annual | 40.6 °F | 57.6 °F | 31.41 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |