Stittville, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3 °C (low) to 13.7 °C (high). Annual precipitation averages 1313.4 Millimeters. Stittville 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 | -10.5 °C | -1.2 °C | 100.33 mm |
| February | -9.9 °C | 0.2 °C | 87.88 mm |
| March | -5.3 °C | 4.8 °C | 92.2 mm |
| April | 1.4 °C | 13 °C | 102.36 mm |
| May | 7.7 °C | 20.3 °C | 117.86 mm |
| June | 13 °C | 24.9 °C | 124.71 mm |
| July | 15.7 °C | 27.4 °C | 122.17 mm |
| August | 14.8 °C | 26.5 °C | 106.17 mm |
| September | 10.8 °C | 22.6 °C | 104.65 mm |
| October | 4.9 °C | 15.2 °C | 133.86 mm |
| November | -0.4 °C | 8.2 °C | 107.7 mm |
| December | -5.9 °C | 1.9 °C | 113.54 mm |
| Annual | 3 °C | 13.7 °C | 1313.43 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 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 |