Fredericton, New Brunswick climate data is summarized below. Average annual temperatures range from 0.7 °C (low) to 11.1 °C (high). Annual precipitation averages 882 Millimeters. Fredericton 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.7 °C | -3.93 °C | 12 mm |
| February | -13.05 °C | -2.72 °C | 18 mm |
| March | -8.23 °C | 2.41 °C | 65 mm |
| April | -1.16 °C | 9.92 °C | 78 mm |
| May | 5.28 °C | 16.91 °C | 92 mm |
| June | 10.43 °C | 21.48 °C | 92 mm |
| July | 14.3 °C | 25.4 °C | 80 mm |
| August | 13.56 °C | 24.76 °C | 82 mm |
| September | 8.66 °C | 20.27 °C | 74 mm |
| October | 3.25 °C | 13.17 °C | 115 mm |
| November | -2.06 °C | 6.41 °C | 111 mm |
| December | -8.81 °C | -0.65 °C | 63 mm |
| Annual | 0.7 °C | 11.1 °C | 882 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| 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 | Moderate Drought |