Barrie, Ontario climate data is summarized below. Average annual temperatures range from 35.6 °F (low) to 53.7 °F (high). Annual precipitation averages 22.7 Inches. Barrie is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -24 °F | -19.3 °F | 127 in. |
| February | -24.6 °F | -19.5 °F | 0 in. |
| March | -21.3 °F | -15.7 °F | 660.4 in. |
| April | -17.5 °F | -11.4 °F | 1041.4 in. |
| May | -14.1 °F | -7.2 °F | 1625.6 in. |
| June | -11.2 °F | -4.7 °F | 2209.8 in. |
| July | -9.7 °F | -3.3 °F | 2692.4 in. |
| August | -10.1 °F | -3.8 °F | 2768.6 in. |
| September | -12.4 °F | -6.2 °F | 1574.8 in. |
| October | -15.2 °F | -10.1 °F | 1016 in. |
| November | -18.5 °F | -13.9 °F | 609.6 in. |
| December | -21.6 °F | -17.8 °F | 330.2 in. |
| Annual | 35.6 °F | 53.7 °F | 22.7 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |