Conway, New Hampshire has a Subarctic With Cool Summers And Year Around Rainfall climate (Köppen classification: Dfc). Average annual temperatures range from 0.8 °C (low) to 13.6 °C (high). Annual precipitation averages 1365.3 Millimeters. Conway is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13 °C | -0.8 °C | 102.87 mm |
| February | -12.4 °C | 0.8 °C | 92.46 mm |
| March | -6.8 °C | 5.5 °C | 104.39 mm |
| April | -0.5 °C | 12.8 °C | 118.11 mm |
| May | 5.8 °C | 19.9 °C | 109.73 mm |
| June | 11.2 °C | 24.4 °C | 115.82 mm |
| July | 14 °C | 27.3 °C | 121.92 mm |
| August | 12.9 °C | 26.6 °C | 106.17 mm |
| September | 8.4 °C | 22.4 °C | 101.6 mm |
| October | 2.3 °C | 14.9 °C | 140.72 mm |
| November | -3.1 °C | 7.8 °C | 116.84 mm |
| December | -8.7 °C | 2.1 °C | 134.62 mm |
| Annual | 0.8 °C | 13.6 °C | 1365.25 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfc - Subarctic With Cool Summers And Year Around Rainfall |