Loudonville, New York has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.7 °C (low) to 14.5 °C (high). Annual precipitation averages 1065.5 Millimeters. Loudonville is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.4 °C | -0.1 °C | 71.63 mm |
| February | -8.7 °C | 1.4 °C | 58.67 mm |
| March | -4.1 °C | 6.4 °C | 76.2 mm |
| April | 2.2 °C | 14.2 °C | 81.28 mm |
| May | 8.6 °C | 20.8 °C | 86.36 mm |
| June | 13.7 °C | 25.3 °C | 113.79 mm |
| July | 16.2 °C | 28 °C | 117.86 mm |
| August | 15.5 °C | 26.9 °C | 101.09 mm |
| September | 11.1 °C | 23 °C | 96.27 mm |
| October | 4.8 °C | 15.8 °C | 103.63 mm |
| November | -0.6 °C | 9.1 °C | 73.66 mm |
| December | -5.4 °C | 2.8 °C | 85.09 mm |
| Annual | 3.7 °C | 14.5 °C | 1065.53 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |