Glencoe, Ontario climate data is summarized below. Average annual temperatures range from 4 °C (low) to 14 °C (high). Annual precipitation averages 652 Millimeters. Glencoe is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.31 °C | -0.89 °C | 16 mm |
| February | -9.83 °C | -1.19 °C | 6 mm |
| March | -3.47 °C | 6.28 °C | 33 mm |
| April | 2.51 °C | 13.87 °C | 53 mm |
| May | 8.57 °C | 20.66 °C | 82 mm |
| June | 13.67 °C | 25.39 °C | 81 mm |
| July | 16.09 °C | 27.64 °C | 103 mm |
| August | 15.43 °C | 26.87 °C | 96 mm |
| September | 11.18 °C | 22.74 °C | 65 mm |
| October | 6.07 °C | 15.91 °C | 53 mm |
| November | 0.52 °C | 8.89 °C | 36 mm |
| December | -4.02 °C | 2.3 °C | 28 mm |
| Annual | 4 °C | 14 °C | 652 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |