Moriah, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.6 °C (low) to 12.7 °C (high). Annual precipitation averages 1075.2 Millimeters. Moriah is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.7 °C | -2.3 °C | 72.64 mm |
| February | -13.1 °C | -0.6 °C | 59.18 mm |
| March | -7.8 °C | 4.2 °C | 75.69 mm |
| April | -0.7 °C | 12.1 °C | 86.11 mm |
| May | 6 °C | 19.3 °C | 95.76 mm |
| June | 11.2 °C | 23.9 °C | 111.76 mm |
| July | 13.9 °C | 26.7 °C | 110.49 mm |
| August | 12.8 °C | 25.7 °C | 100.58 mm |
| September | 8.4 °C | 21.8 °C | 89.92 mm |
| October | 2.4 °C | 14 °C | 105.92 mm |
| November | -2.9 °C | 7 °C | 87.38 mm |
| December | -8.9 °C | 0.8 °C | 79.76 mm |
| Annual | 0.6 °C | 12.7 °C | 1075.19 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |