Downsville, 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 57.3 °F (high). Annual precipitation averages 47.3 Inches. Downsville is located in USDA Plant Hardiness Zone 5b. 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 | 13.4 °F | 31.8 °F | 3.31 in. |
| February | 14.6 °F | 34.8 °F | 2.55 in. |
| March | 21.6 °F | 42.8 °F | 3.39 in. |
| April | 32.4 °F | 56.5 °F | 3.68 in. |
| May | 42.9 °F | 68.3 °F | 3.94 in. |
| June | 52.3 °F | 76.4 °F | 5.07 in. |
| July | 56.9 °F | 81.0 °F | 4.84 in. |
| August | 55.6 °F | 79.4 °F | 4.71 in. |
| September | 48.6 °F | 72.6 °F | 4.62 in. |
| October | 37.9 °F | 60.3 °F | 4.35 in. |
| November | 28.7 °F | 47.3 °F | 3.15 in. |
| December | 20.8 °F | 36.6 °F | 3.72 in. |
| Annual | 35.5 °F | 57.3 °F | 47.33 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| 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 |