Hartwick, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.1 °F (low) to 56.4 °F (high). Annual precipitation averages 46.1 Inches. Hartwick 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 | 12.7 °F | 31.1 °F | 3.22 in. |
| February | 13.7 °F | 33.8 °F | 2.53 in. |
| March | 20.7 °F | 41.8 °F | 3.47 in. |
| April | 31.9 °F | 55.6 °F | 4.05 in. |
| May | 42.9 °F | 68.0 °F | 3.86 in. |
| June | 52.1 °F | 75.4 °F | 5.05 in. |
| July | 56.6 °F | 79.6 °F | 4.54 in. |
| August | 55.2 °F | 78.3 °F | 4.53 in. |
| September | 48.1 °F | 71.6 °F | 3.88 in. |
| October | 37.9 °F | 59.3 °F | 4.07 in. |
| November | 28.5 °F | 46.6 °F | 3.35 in. |
| December | 20.4 °F | 36.0 °F | 3.59 in. |
| Annual | 35.1 °F | 56.4 °F | 46.14 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 5b : -15°F to -10°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 |