Dieppe, New Brunswick climate data is summarized below. Average annual temperatures range from 1.5 °C (low) to 11.2 °C (high). Annual precipitation averages 372 Millimeters. Dieppe 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 | -11.99 °C | -3.09 °C | 4 mm |
| February | -11.5 °C | -2.29 °C | 0 mm |
| March | -7.77 °C | 1.79 °C | 10 mm |
| April | -0.74 °C | 8.89 °C | 20 mm |
| May | 5.12 °C | 16.16 °C | 33 mm |
| June | 10.36 °C | 20.88 °C | 52 mm |
| July | 14.75 °C | 25.41 °C | 67 mm |
| August | 14.32 °C | 24.78 °C | 63 mm |
| September | 9.5 °C | 20.35 °C | 48 mm |
| October | 4.14 °C | 13.63 °C | 33 mm |
| November | -1.06 °C | 7.05 °C | 32 mm |
| December | -7.43 °C | 0.41 °C | 10 mm |
| Annual | 1.5 °C | 11.2 °C | 372 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |