Amaranth, Manitoba climate data is summarized below. Average annual temperatures range from -2.3 °C (low) to 7.7 °C (high). Annual precipitation averages 459 Millimeters. Amaranth is located in USDA Plant Hardiness Zone 3b. 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 | -20.66 °C | -10.78 °C | 0 mm |
| February | -20.59 °C | -9.82 °C | 0 mm |
| March | -11.75 °C | -1.55 °C | 1 mm |
| April | -2.7 °C | 7.54 °C | 23 mm |
| May | 4.64 °C | 15.54 °C | 82 mm |
| June | 11.18 °C | 21.38 °C | 112 mm |
| July | 13.96 °C | 24.57 °C | 78 mm |
| August | 13.05 °C | 24.03 °C | 79 mm |
| September | 8.36 °C | 19.17 °C | 41 mm |
| October | 2.08 °C | 10.79 °C | 43 mm |
| November | -6.5 °C | 0.75 °C | 0 mm |
| December | -18.1 °C | -9.68 °C | 0 mm |
| Annual | -2.3 °C | 7.7 °C | 459 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Normal |