Addison, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.5 °F (low) to 58.6 °F (high). Annual precipitation averages 34.9 Inches. Addison is located in USDA Plant Hardiness Zone 6a. 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 | 14.9 °F | 32.9 °F | 1.85 in. |
| February | 15.9 °F | 35.7 °F | 1.6 in. |
| March | 22.9 °F | 44.1 °F | 2.53 in. |
| April | 33.1 °F | 57.7 °F | 3.14 in. |
| May | 44.1 °F | 70.1 °F | 3.19 in. |
| June | 53.4 °F | 78.1 °F | 3.47 in. |
| July | 57.6 °F | 82.4 °F | 3.75 in. |
| August | 56.4 °F | 80.7 °F | 3.38 in. |
| September | 49.4 °F | 73.6 °F | 3.71 in. |
| October | 38.8 °F | 61.3 °F | 3.67 in. |
| November | 29.5 °F | 48.5 °F | 2.53 in. |
| December | 21.9 °F | 37.7 °F | 2.11 in. |
| Annual | 36.5 °F | 58.6 °F | 34.93 in. |
| 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 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |