North Blenheim, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.7 °C (low) to 14.5 °C (high). Annual precipitation averages 997.2 Millimeters. North Blenheim 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 | -9.9 °C | 0.3 °C | 61.47 mm |
| February | -9.1 °C | 1.8 °C | 52.07 mm |
| March | -5.1 °C | 6.2 °C | 70.87 mm |
| April | 1.2 °C | 14.1 °C | 83.82 mm |
| May | 7.2 °C | 20.8 °C | 89.66 mm |
| June | 12.3 °C | 25.2 °C | 109.98 mm |
| July | 14.9 °C | 27.7 °C | 109.22 mm |
| August | 14.1 °C | 26.8 °C | 97.54 mm |
| September | 9.9 °C | 23 °C | 91.19 mm |
| October | 3.8 °C | 16 °C | 93.73 mm |
| November | -1.3 °C | 9.1 °C | 67.06 mm |
| December | -5.8 °C | 3 °C | 70.61 mm |
| Annual | 2.7 °C | 14.5 °C | 997.22 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |