Dieppe, New Brunswick climate data is summarized below. Average annual temperatures range from 34.7 °F (low) to 52.1 °F (high). Annual precipitation averages 14.7 Inches. 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 | -24.4 °F | -19.5 °F | 101.6 in. |
| February | -24.2 °F | -19.1 °F | 0 in. |
| March | -22.1 °F | -16.8 °F | 254 in. |
| April | -18.2 °F | -12.8 °F | 508 in. |
| May | -14.9 °F | -8.8 °F | 838.2 in. |
| June | -12 °F | -6.2 °F | 1320.8 in. |
| July | -9.6 °F | -3.7 °F | 1701.8 in. |
| August | -9.8 °F | -4 °F | 1600.2 in. |
| September | -12.5 °F | -6.5 °F | 1219.2 in. |
| October | -15.5 °F | -10.2 °F | 838.2 in. |
| November | -18.4 °F | -13.9 °F | 812.8 in. |
| December | -21.9 °F | -17.6 °F | 254 in. |
| Annual | 34.7 °F | 52.1 °F | 14.65 in. |
| 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 : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |