Thompson, Manitoba climate data is summarized below. Average annual temperatures range from 18.4 °F (low) to 37.9 °F (high). Annual precipitation averages 17.9 Inches. 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 | -32.6 °F | -27.5 °F | 0 in. |
| February | -32.2 °F | -25.7 °F | 0 in. |
| March | -29.2 °F | -21.5 °F | 0 in. |
| April | -23.2 °F | -16 °F | 50.8 in. |
| May | -18.1 °F | -10.6 °F | 889 in. |
| June | -13.8 °F | -6.4 °F | 2209.8 in. |
| July | -11.7 °F | -4.8 °F | 3378.2 in. |
| August | -12.4 °F | -6.1 °F | 2514.6 in. |
| September | -15.4 °F | -9.6 °F | 1701.8 in. |
| October | -18.6 °F | -15.3 °F | 762 in. |
| November | -25.2 °F | -21.3 °F | 0 in. |
| December | -31.2 °F | -26.8 °F | 0 in. |
| Annual | 18.4 °F | 37.9 °F | 17.85 in. |
| 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 : -55°F to -50°F |
| Current Drought Conditions | Normal |