Conway, New Hampshire has a Subarctic With Cool Summers And Year Around Rainfall climate (Köppen classification: Dfc). Average annual temperatures range from 33.5 °F (low) to 56.6 °F (high). Annual precipitation averages 53.8 Inches. 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 | 8.6 °F | 30.5 °F | 4.05 in. |
| February | 9.7 °F | 33.4 °F | 3.64 in. |
| March | 19.7 °F | 41.9 °F | 4.11 in. |
| April | 31.1 °F | 55.1 °F | 4.65 in. |
| May | 42.5 °F | 67.8 °F | 4.32 in. |
| June | 52.2 °F | 76.0 °F | 4.56 in. |
| July | 57.2 °F | 81.2 °F | 4.8 in. |
| August | 55.3 °F | 79.9 °F | 4.18 in. |
| September | 47.2 °F | 72.3 °F | 4.0 in. |
| October | 36.2 °F | 58.8 °F | 5.54 in. |
| November | 26.4 °F | 46.1 °F | 4.6 in. |
| December | 16.3 °F | 35.7 °F | 5.3 in. |
| Annual | 33.5 °F | 56.6 °F | 53.75 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfc - Subarctic With Cool Summers And Year Around Rainfall |