Dowling, Ontario climate data is summarized below. Average annual temperatures range from -1.3 °C (low) to 10.1 °C (high). Annual precipitation averages 604 Millimeters. Dowling 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -16.9 °C | -6.52 °C | 0 mm |
| February | -17.32 °C | -5.74 °C | 0 mm |
| March | -10.41 °C | 1.53 °C | 12 mm |
| April | -2.26 °C | 9.5 °C | 59 mm |
| May | 4.91 °C | 18.45 °C | 71 mm |
| June | 10.29 °C | 23.2 °C | 69 mm |
| July | 12.19 °C | 25.27 °C | 73 mm |
| August | 11.54 °C | 24.11 °C | 86 mm |
| September | 6.83 °C | 19.34 °C | 83 mm |
| October | 1.7 °C | 11.64 °C | 99 mm |
| November | -4.25 °C | 4.25 °C | 50 mm |
| December | -12.09 °C | -3.48 °C | 2 mm |
| Annual | -1.3 °C | 10.1 °C | 604 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Normal |