Hamlin, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 40.8 °F (low) to 57.4 °F (high). Annual precipitation averages 32 Inches. Hamlin 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 | 19.0 °F | 33.2 °F | 2.23 in. |
| February | 19.5 °F | 34.3 °F | 1.84 in. |
| March | 26.3 °F | 42.0 °F | 2.31 in. |
| April | 36.5 °F | 55.2 °F | 2.82 in. |
| May | 47.0 °F | 67.4 °F | 2.85 in. |
| June | 57.2 °F | 76.0 °F | 3.04 in. |
| July | 63.1 °F | 80.6 °F | 3.08 in. |
| August | 61.8 °F | 79.5 °F | 2.75 in. |
| September | 55.0 °F | 72.9 °F | 2.99 in. |
| October | 44.1 °F | 60.7 °F | 3.16 in. |
| November | 34.1 °F | 48.9 °F | 2.45 in. |
| December | 25.5 °F | 38.6 °F | 2.43 in. |
| Annual | 40.8 °F | 57.4 °F | 31.95 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 |