Morrisville, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.8 °F (low) to 55.3 °F (high). Annual precipitation averages 46.5 Inches. Morrisville 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 12.2 °F | 29.4 °F | 3.21 in. |
| February | 13.9 °F | 31.6 °F | 2.85 in. |
| March | 20.8 °F | 39.8 °F | 3.61 in. |
| April | 33.1 °F | 54.0 °F | 3.82 in. |
| May | 44.5 °F | 66.9 °F | 3.95 in. |
| June | 53.3 °F | 75.4 °F | 4.69 in. |
| July | 57.8 °F | 79.4 °F | 4.43 in. |
| August | 56.3 °F | 77.6 °F | 4.25 in. |
| September | 49.7 °F | 71.1 °F | 4.07 in. |
| October | 38.9 °F | 58.2 °F | 4.27 in. |
| November | 29.2 °F | 45.5 °F | 3.63 in. |
| December | 20.0 °F | 34.5 °F | 3.69 in. |
| Annual | 35.8 °F | 55.3 °F | 46.47 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| 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 |