Elmira, Ontario climate data is summarized below. Average annual temperatures range from 36.3 °F (low) to 53.5 °F (high). Annual precipitation averages 25.1 Inches. 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 | -23.4 °F | -19.4 °F | 101.6 in. |
| February | -24.2 °F | -19.6 °F | 0 in. |
| March | -20.8 °F | -15.6 °F | 812.8 in. |
| April | -17.3 °F | -11.4 °F | 1346.2 in. |
| May | -13.8 °F | -7.3 °F | 2159 in. |
| June | -11.1 °F | -4.8 °F | 2489.2 in. |
| July | -9.9 °F | -3.5 °F | 2590.8 in. |
| August | -10.2 °F | -4 °F | 2311.4 in. |
| September | -12.4 °F | -6.3 °F | 1676.4 in. |
| October | -15.2 °F | -10.2 °F | 1346.2 in. |
| November | -18.4 °F | -14 °F | 787.4 in. |
| December | -21 °F | -17.7 °F | 533.4 in. |
| Annual | 36.3 °F | 53.5 °F | 25.06 in. |
| 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 : -15°F to -10°F |
| Current Drought Conditions | Normal |