Erin, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.7 °F (low) to 56.2 °F (high). Annual precipitation averages 39.7 Inches. Erin 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 | 30.8 °F | 2.37 in. |
| February | 13.6 °F | 33.0 °F | 2.02 in. |
| March | 20.6 °F | 41.1 °F | 2.97 in. |
| April | 30.9 °F | 55.1 °F | 3.51 in. |
| May | 41.8 °F | 67.5 °F | 3.46 in. |
| June | 51.9 °F | 75.7 °F | 4.34 in. |
| July | 56.0 °F | 80.0 °F | 3.96 in. |
| August | 54.7 °F | 78.7 °F | 3.71 in. |
| September | 47.8 °F | 71.7 °F | 3.97 in. |
| October | 37.5 °F | 59.0 °F | 3.82 in. |
| November | 28.0 °F | 46.5 °F | 2.92 in. |
| December | 20.0 °F | 35.7 °F | 2.62 in. |
| Annual | 34.7 °F | 56.2 °F | 39.67 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 |