Sidney, 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 58.2 °F (high). Annual precipitation averages 43.5 Inches. Sidney 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 | 13.5 °F | 32.0 °F | 2.91 in. |
| February | 14.6 °F | 35.1 °F | 2.48 in. |
| March | 21.3 °F | 43.1 °F | 3.16 in. |
| April | 32.5 °F | 57.8 °F | 3.57 in. |
| May | 43.9 °F | 70.3 °F | 3.72 in. |
| June | 52.9 °F | 78.2 °F | 4.7 in. |
| July | 57.5 °F | 82.2 °F | 4.31 in. |
| August | 56.2 °F | 80.3 °F | 4.33 in. |
| September | 49.3 °F | 73.3 °F | 3.99 in. |
| October | 38.8 °F | 61.0 °F | 3.97 in. |
| November | 29.2 °F | 47.8 °F | 3.17 in. |
| December | 21.4 °F | 36.8 °F | 3.18 in. |
| Annual | 35.9 °F | 58.2 °F | 43.49 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 |