Cayuga, Ontario climate data is summarized below. Average annual temperatures range from 4.2 °C (low) to 13.5 °C (high). Annual precipitation averages 796 Millimeters. Cayuga is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.99 °C | -0.69 °C | 28 mm |
| February | -9.45 °C | -1.25 °C | 29 mm |
| March | -3.52 °C | 5.63 °C | 72 mm |
| April | 2.16 °C | 12.53 °C | 84 mm |
| May | 8.22 °C | 19.55 °C | 84 mm |
| June | 13.8 °C | 24.35 °C | 70 mm |
| July | 16.23 °C | 26.74 °C | 93 mm |
| August | 15.71 °C | 26.03 °C | 74 mm |
| September | 11.67 °C | 22 °C | 70 mm |
| October | 6.43 °C | 15.29 °C | 75 mm |
| November | 0.83 °C | 8.69 °C | 57 mm |
| December | -3.66 °C | 2.56 °C | 60 mm |
| Annual | 4.2 °C | 13.5 °C | 796 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |