Jasper, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.5 °F (low) to 56.3 °F (high). Annual precipitation averages 37.7 Inches. Jasper is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.6 °F | 31.6 °F | 2.4 in. |
| February | 15.3 °F | 33.4 °F | 1.82 in. |
| March | 22.1 °F | 42.0 °F | 2.65 in. |
| April | 32.8 °F | 54.9 °F | 3.09 in. |
| May | 43.7 °F | 67.4 °F | 3.46 in. |
| June | 52.1 °F | 75.3 °F | 4.1 in. |
| July | 56.0 °F | 79.5 °F | 3.73 in. |
| August | 54.5 °F | 78.2 °F | 3.62 in. |
| September | 47.3 °F | 71.7 °F | 3.81 in. |
| October | 37.7 °F | 59.1 °F | 3.66 in. |
| November | 29.1 °F | 46.5 °F | 2.82 in. |
| December | 20.9 °F | 35.6 °F | 2.51 in. |
| Annual | 35.5 °F | 56.3 °F | 37.67 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 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 |