Thurso, Quebec climate data is summarized below. Average annual temperatures range from 1.1 °C (low) to 11.8 °C (high). Annual precipitation averages 354 Millimeters. Thurso 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 | -14.59 °C | -5.05 °C | 0 mm |
| February | -14.38 °C | -4.1 °C | 0 mm |
| March | -8.04 °C | 2.32 °C | 13 mm |
| April | 0.41 °C | 11.75 °C | 28 mm |
| May | 7.42 °C | 20.1 °C | 30 mm |
| June | 12.75 °C | 24.41 °C | 59 mm |
| July | 14.98 °C | 26.83 °C | 76 mm |
| August | 13.98 °C | 25.77 °C | 66 mm |
| September | 9.21 °C | 21.27 °C | 38 mm |
| October | 3.75 °C | 13.66 °C | 26 mm |
| November | -2.25 °C | 6.3 °C | 12 mm |
| December | -9.8 °C | -2 °C | 6 mm |
| Annual | 1.1 °C | 11.8 °C | 354 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 |