Charlesbourg, Quebec climate data is summarized below. Average annual temperatures range from 0.3 °C (low) to 9.5 °C (high). Annual precipitation averages 920 Millimeters. Charlesbourg is located in USDA Plant Hardiness Zone 5a. 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 | -15.51 °C | -6.55 °C | 0 mm |
| February | -14.48 °C | -5.49 °C | 0 mm |
| March | -9.08 °C | 0.18 °C | 11 mm |
| April | -0.86 °C | 8.43 °C | 65 mm |
| May | 6 °C | 16.95 °C | 92 mm |
| June | 11.27 °C | 21.79 °C | 125 mm |
| July | 14.3 °C | 24.54 °C | 152 mm |
| August | 13.62 °C | 23.63 °C | 139 mm |
| September | 8.79 °C | 18.77 °C | 119 mm |
| October | 3.28 °C | 11.16 °C | 128 mm |
| November | -2.56 °C | 4.15 °C | 78 mm |
| December | -10.78 °C | -3.57 °C | 11 mm |
| Annual | 0.3 °C | 9.5 °C | 920 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 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |