Conway, Massachusetts has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.8 °C (low) to 13.9 °C (high). Annual precipitation averages 1319.3 Millimeters. Conway is located in USDA Plant Hardiness Zone 6a. 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 | -11.2 °C | -0.3 °C | 92.2 mm |
| February | -10.7 °C | 1.4 °C | 85.34 mm |
| March | -5.7 °C | 6.1 °C | 106.43 mm |
| April | 0.4 °C | 13.2 °C | 109.47 mm |
| May | 6.6 °C | 19.7 °C | 102.87 mm |
| June | 11.7 °C | 24.5 °C | 121.67 mm |
| July | 14.6 °C | 27.3 °C | 112.78 mm |
| August | 13.4 °C | 26.3 °C | 112.27 mm |
| September | 9.1 °C | 22.4 °C | 124.97 mm |
| October | 3 °C | 15.3 °C | 134.37 mm |
| November | -2.4 °C | 8.6 °C | 103.12 mm |
| December | -7.2 °C | 2.6 °C | 113.79 mm |
| Annual | 1.8 °C | 13.9 °C | 1319.28 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 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |