Thompson, Manitoba climate data is summarized below. Average annual temperatures range from -7.6 °C (low) to 3.3 °C (high). Annual precipitation averages 453 Millimeters. Thompson is located in USDA Plant Hardiness Zone 1b. The growing season typically runs from the last frost around Jun. 11 - Jun. 20 through the first frost around Aug. 11 - Aug. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -26.65 °C | -17.54 °C | 0 mm |
| February | -25.99 °C | -14.28 °C | 0 mm |
| March | -20.48 °C | -6.67 °C | 0 mm |
| April | -9.72 °C | 3.15 °C | 2 mm |
| May | -0.57 °C | 12.9 °C | 35 mm |
| June | 7.19 °C | 20.5 °C | 87 mm |
| July | 10.94 °C | 23.3 °C | 133 mm |
| August | 9.63 °C | 21.08 °C | 99 mm |
| September | 4.29 °C | 14.77 °C | 67 mm |
| October | -1.55 °C | 4.52 °C | 30 mm |
| November | -13.27 °C | -6.29 °C | 0 mm |
| December | -24.2 °C | -16.23 °C | 0 mm |
| Annual | -7.6 °C | 3.3 °C | 453 mm |
| Average First Frost Date | Aug. 11 - Aug. 20 |
| Average Last Frost Date | Jun. 11 - Jun. 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 1b : |
| Current Drought Conditions | Normal |