Smyrna, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.6 °F (low) to 57.1 °F (high). Annual precipitation averages 44.3 Inches. Smyrna 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 | 12.8 °F | 31.4 °F | 2.96 in. |
| February | 13.8 °F | 33.9 °F | 2.6 in. |
| March | 20.9 °F | 42.0 °F | 3.34 in. |
| April | 32.6 °F | 55.7 °F | 3.52 in. |
| May | 43.8 °F | 68.6 °F | 3.76 in. |
| June | 53.0 °F | 76.7 °F | 4.7 in. |
| July | 57.5 °F | 80.9 °F | 4.45 in. |
| August | 56.0 °F | 79.6 °F | 4.28 in. |
| September | 48.8 °F | 72.8 °F | 3.92 in. |
| October | 38.6 °F | 60.0 °F | 4.03 in. |
| November | 29.1 °F | 47.2 °F | 3.32 in. |
| December | 20.8 °F | 36.3 °F | 3.46 in. |
| Annual | 35.6 °F | 57.1 °F | 44.34 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 |