Riverton, Manitoba climate data is summarized below. Average annual temperatures range from -2.8 °C (low) to 6.6 °C (high). Annual precipitation averages 543 Millimeters. Riverton is located in USDA Plant Hardiness Zone 3a. 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 | -22.2 °C | -12.27 °C | 0 mm |
| February | -21.96 °C | -10.46 °C | 0 mm |
| March | -12.67 °C | -1.64 °C | 0 mm |
| April | -3.24 °C | 7.08 °C | 31 mm |
| May | 3.28 °C | 14.02 °C | 96 mm |
| June | 9.89 °C | 19.48 °C | 124 mm |
| July | 13.18 °C | 22.86 °C | 94 mm |
| August | 12.75 °C | 22.3 °C | 103 mm |
| September | 8.54 °C | 17.88 °C | 45 mm |
| October | 2.75 °C | 10.07 °C | 50 mm |
| November | -6.02 °C | 0.5 °C | 0 mm |
| December | -18.31 °C | -10.37 °C | 0 mm |
| Annual | -2.8 °C | 6.6 °C | 543 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 3a : -40°C to -37.2°C |
| Current Drought Conditions | Normal |