Middleport, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.6 °C (low) to 14.1 °C (high). Annual precipitation averages 940.1 Millimeters. Middleport is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.3 °C | 0.4 °C | 73.41 mm |
| February | -7.3 °C | 1.1 °C | 56.13 mm |
| March | -3.5 °C | 5.6 °C | 69.85 mm |
| April | 2.3 °C | 13 °C | 81.03 mm |
| May | 8.4 °C | 19.9 °C | 79.5 mm |
| June | 14 °C | 24.9 °C | 81.03 mm |
| July | 16.7 °C | 27.1 °C | 85.34 mm |
| August | 16.1 °C | 26.6 °C | 81.53 mm |
| September | 12.1 °C | 22.9 °C | 89.15 mm |
| October | 6.3 °C | 15.8 °C | 90.42 mm |
| November | 0.7 °C | 9.1 °C | 76.71 mm |
| December | -3.8 °C | 3.3 °C | 75.95 mm |
| Annual | 4.6 °C | 14.1 °C | 940.05 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |