Tully, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.3 °F (low) to 55.1 °F (high). Annual precipitation averages 43.8 Inches. Tully is located in USDA Plant Hardiness Zone 5b. 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 | 13.1 °F | 29.8 °F | 2.86 in. |
| February | 14.4 °F | 31.9 °F | 2.33 in. |
| March | 21.7 °F | 39.7 °F | 3.24 in. |
| April | 33.5 °F | 53.3 °F | 3.57 in. |
| May | 44.4 °F | 66.1 °F | 3.72 in. |
| June | 53.8 °F | 74.2 °F | 4.65 in. |
| July | 58.2 °F | 78.7 °F | 4.27 in. |
| August | 56.6 °F | 77.3 °F | 4.05 in. |
| September | 49.7 °F | 70.8 °F | 4.05 in. |
| October | 39.6 °F | 58.0 °F | 4.39 in. |
| November | 30.0 °F | 45.9 °F | 3.4 in. |
| December | 20.7 °F | 35.0 °F | 3.24 in. |
| Annual | 36.3 °F | 55.1 °F | 43.77 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°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 |