Oakville, Ontario Climate Data

Oakville, Ontario climate data is summarized below. Average annual temperatures range from 5.3 °C (low) to 13.3 °C (high). Annual precipitation averages 921 Millimeters. Oakville 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.

Avg Annual High13.3 °C
Avg Annual Low5.3 °C
Annual Precipitation921 mm
Hardiness ZoneZone 6b
Growing Season: Last frost around Apr. 11 - Apr. 20 — First frost around Nov. 1 - Nov. 10 — Approximately 100-125 Days frost days per year.

Monthly Average Climate Data for Oakville, Ontario

Average monthly temperatures and precipitation Switch to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-6.91 °C-0.45 °C24 mm
February-8.2 °C-0.92 °C35 mm
March-2.46 °C5.41 °C77 mm
April3.22 °C11.88 °C96 mm
May9.21 °C18.69 °C102 mm
June14.82 °C23.96 °C86 mm
July17.71 °C26.98 °C101 mm
August17.37 °C26.3 °C102 mm
September13.15 °C22.09 °C77 mm
October7.43 °C15.1 °C87 mm
November1.6 °C8.55 °C68 mm
December-3.01 °C2.44 °C66 mm
Annual5.3 °C13.3 °C921 mm

Additional Climate Conditions

Feels Like High-4.34|-5.03|2.71|10.41|18.4|24.29|27.7|27.07|22.3|14.29|6.56|-0.88 °C
Feels Like Low-13|-14.31|-7.2|-0.14|7.58|14.23|17.61|17.23|12.32|5.25|-2|-8.31 °C
Avg Humidity74.18|71.86|66.6|62.27|62.7|65.22|64.46|67.59|70.22|73.54|74.31|76.61%
Avg Wind Speed16.63|16.51|15.55|15.04|12.39|11.95|11.38|11.27|12.11|14.07|14.88|16.57 mph
Cloud Cover78.31|73.47|67|61|55.41|50.81|41.59|39.91|46.5|62.91|67.81|82.31%
Days of Precipitation10|9|11|12|13|10|11|10|9|12|10|10 days/yr
Annual Snowfall23|29|14|3|0|0|0|0|0|0|2|13 mm

Climate Zone Data for Oakville, Ontario

Average First Frost DateNov. 1 - Nov. 10
Average Last Frost DateApr. 11 - Apr. 20
Average Days With Frost100-125 Days
Plant Hardiness ZoneZone 6b : -20.6°C to -17.8°C
Current Drought ConditionsNormal
2026 plantmaps.com