Birtle, Manitoba climate data is summarized below. Average annual temperatures range from -3 °C (low) to 7.9 °C (high). Annual precipitation averages 315 Millimeters. Birtle 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.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -20.66 °C | -10.82 °C | 0 mm |
| February | -20.51 °C | -9.9 °C | 0 mm |
| March | -11.85 °C | -0.98 °C | 2 mm |
| April | -2.21 °C | 8.98 °C | 7 mm |
| May | 4.46 °C | 16.89 °C | 28 mm |
| June | 10.57 °C | 21.79 °C | 76 mm |
| July | 12.98 °C | 24.64 °C | 99 mm |
| August | 11.37 °C | 24.2 °C | 64 mm |
| September | 6.5 °C | 19.57 °C | 23 mm |
| October | 0.43 °C | 10.64 °C | 16 mm |
| November | -8.57 °C | -0.11 °C | 0 mm |
| December | -18.59 °C | -10.25 °C | 0 mm |
| Annual | -3 °C | 7.9 °C | 315 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| 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 |