Fort Ann, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.5 °F (low) to 58 °F (high). Annual precipitation averages 40.7 Inches. Fort Ann is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.7 °F | 30.3 °F | 2.7 in. |
| February | 12.3 °F | 33.9 °F | 2.25 in. |
| March | 23.1 °F | 42.8 °F | 2.84 in. |
| April | 35.7 °F | 57.7 °F | 3.3 in. |
| May | 47.0 °F | 70.2 °F | 3.34 in. |
| June | 56.3 °F | 78.5 °F | 4.21 in. |
| July | 61.2 °F | 83.2 °F | 4.24 in. |
| August | 59.6 °F | 81.1 °F | 3.9 in. |
| September | 51.6 °F | 73.8 °F | 3.37 in. |
| October | 40.3 °F | 60.5 °F | 4.03 in. |
| November | 30.1 °F | 47.4 °F | 3.21 in. |
| December | 21.0 °F | 36.0 °F | 3.32 in. |
| Annual | 37.5 °F | 58 °F | 40.71 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |