Vienna, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.9 °C (low) to 13.7 °C (high). Annual precipitation averages 1209.5 Millimeters. Vienna is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.4 °C | -0.9 °C | 90.68 mm |
| February | -9.8 °C | 0.3 °C | 78.23 mm |
| March | -5.3 °C | 4.8 °C | 84.58 mm |
| April | 1.2 °C | 12.9 °C | 93.47 mm |
| May | 7.6 °C | 20.2 °C | 105.66 mm |
| June | 12.6 °C | 24.7 °C | 110.49 mm |
| July | 15.2 °C | 27.2 °C | 108.2 mm |
| August | 14.5 °C | 26.4 °C | 103.12 mm |
| September | 10.4 °C | 22.6 °C | 108.2 mm |
| October | 4.8 °C | 15.3 °C | 125.73 mm |
| November | -0.3 °C | 8.4 °C | 98.81 mm |
| December | -5.8 °C | 2.2 °C | 102.36 mm |
| Annual | 2.9 °C | 13.7 °C | 1209.53 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |