Riverton, Manitoba climate data is summarized below. Average annual temperatures range from 26.9 °F (low) to 43.9 °F (high). Annual precipitation averages 21.4 Inches. 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 | -30.1 °F | -24.6 °F | 0 in. |
| February | -30 °F | -23.6 °F | 0 in. |
| March | -24.8 °F | -18.7 °F | 0 in. |
| April | -19.6 °F | -13.8 °F | 787.4 in. |
| May | -16 °F | -10 °F | 2438.4 in. |
| June | -12.3 °F | -7 °F | 3149.6 in. |
| July | -10.5 °F | -5.1 °F | 2387.6 in. |
| August | -10.7 °F | -5.4 °F | 2616.2 in. |
| September | -13 °F | -7.8 °F | 1143 in. |
| October | -16.3 °F | -12.2 °F | 1270 in. |
| November | -21.1 °F | -17.5 °F | 0 in. |
| December | -28 °F | -23.5 °F | 0 in. |
| Annual | 26.9 °F | 43.9 °F | 21.38 in. |
| 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°F to -35°F |
| Current Drought Conditions | Normal |