St. Jean-Baptiste, Manitoba climate data is summarized below. Average annual temperatures range from -1.6 °C (low) to 9.1 °C (high). Annual precipitation averages 385 Millimeters. St. Jean-Baptiste is located in USDA Plant Hardiness Zone 4a. 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 | -19.77 °C | -10.75 °C | 0 mm |
| February | -18.9 °C | -9.24 °C | 0 mm |
| March | -9.47 °C | 0.29 °C | 9 mm |
| April | -1.03 °C | 9.99 °C | 17 mm |
| May | 5.29 °C | 17.98 °C | 55 mm |
| June | 11.72 °C | 23.34 °C | 74 mm |
| July | 13.82 °C | 26.02 °C | 96 mm |
| August | 12.54 °C | 25.65 °C | 74 mm |
| September | 7.97 °C | 20.74 °C | 48 mm |
| October | 1.69 °C | 12 °C | 10 mm |
| November | -6.65 °C | 1.69 °C | 2 mm |
| December | -16.79 °C | -9.05 °C | 0 mm |
| Annual | -1.6 °C | 9.1 °C | 385 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 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Abnormally Dry |