Amherstburg, Ontario climate data is summarized below. Average annual temperatures range from 6.7 °C (low) to 13.7 °C (high). Annual precipitation averages 501 Millimeters. Amherstburg is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.58 °C | -0.43 °C | 18 mm |
| February | -7.3 °C | -0.57 °C | 9 mm |
| March | -1.21 °C | 6.54 °C | 35 mm |
| April | 4.43 °C | 12.88 °C | 48 mm |
| May | 10.85 °C | 19.2 °C | 56 mm |
| June | 16.73 °C | 24.2 °C | 68 mm |
| July | 19.28 °C | 26.63 °C | 62 mm |
| August | 18.98 °C | 26.11 °C | 56 mm |
| September | 14.89 °C | 22.17 °C | 54 mm |
| October | 9.08 °C | 15.84 °C | 33 mm |
| November | 2.75 °C | 8.92 °C | 36 mm |
| December | -2.19 °C | 2.9 °C | 26 mm |
| Annual | 6.7 °C | 13.7 °C | 501 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Normal |