Napinka, Manitoba climate data is summarized below. Average annual temperatures range from -2 °C (low) to 9.3 °C (high). Annual precipitation averages 586 Millimeters. Napinka 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 | -19.14 °C | -8.94 °C | 0 mm |
| February | -18.57 °C | -8.3 °C | 0 mm |
| March | -9.7 °C | 0.74 °C | 6 mm |
| April | -1.44 °C | 10.21 °C | 52 mm |
| May | 4.99 °C | 17.59 °C | 113 mm |
| June | 11.14 °C | 22.63 °C | 126 mm |
| July | 13.63 °C | 25.64 °C | 121 mm |
| August | 12.16 °C | 25.58 °C | 67 mm |
| September | 7.36 °C | 20.64 °C | 59 mm |
| October | 0.87 °C | 12.09 °C | 38 mm |
| November | -7.57 °C | 1.78 °C | 4 mm |
| December | -17.27 °C | -8.54 °C | 0 mm |
| Annual | -2 °C | 9.3 °C | 586 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 | Abnormally Dry |