Hampstead, Quebec climate data is summarized below. Average annual temperatures range from 3.6 °C (low) to 11.8 °C (high). Annual precipitation averages 937 Millimeters. Hampstead is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.54 °C | -4.21 °C | 16 mm |
| February | -11.24 °C | -3.79 °C | 18 mm |
| March | -5.2 °C | 3.04 °C | 54 mm |
| April | 2.55 °C | 11.84 °C | 108 mm |
| May | 9.45 °C | 19.48 °C | 89 mm |
| June | 14.55 °C | 23.76 °C | 103 mm |
| July | 17.38 °C | 26.43 °C | 136 mm |
| August | 16.7 °C | 25.59 °C | 108 mm |
| September | 11.95 °C | 21.16 °C | 72 mm |
| October | 6.04 °C | 13.49 °C | 110 mm |
| November | -0.06 °C | 6.56 °C | 76 mm |
| December | -7.13 °C | -1.28 °C | 47 mm |
| Annual | 3.6 °C | 11.8 °C | 937 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |