Galway, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.1 °C (low) to 13.1 °C (high). Annual precipitation averages 1215.1 Millimeters. Galway 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 | -11.3 °C | -1.6 °C | 91.44 mm |
| February | -10.6 °C | 0 °C | 71.37 mm |
| March | -5.9 °C | 4.9 °C | 95.25 mm |
| April | 0.6 °C | 12.8 °C | 98.81 mm |
| May | 7.2 °C | 19.6 °C | 102.36 mm |
| June | 12.2 °C | 24.1 °C | 120.14 mm |
| July | 15 °C | 26.6 °C | 117.35 mm |
| August | 14 °C | 25.7 °C | 106.93 mm |
| September | 9.9 °C | 21.7 °C | 106.43 mm |
| October | 3.7 °C | 14.7 °C | 113.54 mm |
| November | -1.9 °C | 7.6 °C | 89.92 mm |
| December | -7.2 °C | 1.3 °C | 101.6 mm |
| Annual | 2.1 °C | 13.1 °C | 1215.14 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 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |