Granville, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.9 °F (low) to 57.3 °F (high). Annual precipitation averages 42.5 Inches. Granville 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 | 11.0 °F | 30.2 °F | 2.91 in. |
| February | 11.8 °F | 33.2 °F | 2.26 in. |
| March | 22.1 °F | 42.2 °F | 2.98 in. |
| April | 33.7 °F | 57.0 °F | 3.35 in. |
| May | 45.2 °F | 69.2 °F | 3.62 in. |
| June | 54.5 °F | 77.6 °F | 4.58 in. |
| July | 58.7 °F | 82.2 °F | 4.29 in. |
| August | 57.4 °F | 80.4 °F | 4.19 in. |
| September | 49.3 °F | 73.2 °F | 3.65 in. |
| October | 38.2 °F | 60.1 °F | 4.08 in. |
| November | 29.0 °F | 47.0 °F | 3.21 in. |
| December | 19.5 °F | 35.5 °F | 3.34 in. |
| Annual | 35.9 °F | 57.3 °F | 42.46 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 |