Elmira, Ontario climate data is summarized below. Average annual temperatures range from 2.4 °C (low) to 12 °C (high). Annual precipitation averages 636 Millimeters. Elmira is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.07 °C | -2.91 °C | 4 mm |
| February | -11.54 °C | -3.26 °C | 0 mm |
| March | -5.5 °C | 3.92 °C | 32 mm |
| April | 0.84 °C | 11.57 °C | 53 mm |
| May | 7.15 °C | 18.84 °C | 85 mm |
| June | 12.03 °C | 23.43 °C | 98 mm |
| July | 14.25 °C | 25.66 °C | 102 mm |
| August | 13.68 °C | 24.84 °C | 91 mm |
| September | 9.73 °C | 20.69 °C | 66 mm |
| October | 4.67 °C | 13.69 °C | 53 mm |
| November | -1.05 °C | 6.8 °C | 31 mm |
| December | -5.79 °C | 0.15 °C | 21 mm |
| Annual | 2.4 °C | 12 °C | 636 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |