Oakville, Ontario Weather by Month and Climate Averages

How much rain does Oakville get?

Oakville gets 832 mm of precipitation in an average year, spread over about 126 days with measurable rain. That is more rainy days than 55% of Canada.

April is the wettest month, with 89 mm. March is the driest, with 49 mm. October has the most rainy days, about 15.

The longest dry spell in the last five years lasted 224 days, to December 7, 2022.

Does it snow in Oakville?

The snowiest winter on record is 2013–14, with 144 cm.

The most recent measurable snow at the station fell on April 20, 2021.

Oakville weather by month

Oakville weather in January

In January, Oakville averages a high of -1°C and a low of -8°C. It gets 65 mm of precipitation over about 11 rainy days. The sun is out about 18% of daylight hours. The January record high is 16°C (2008) and the record low is -24°C (2014).

Oakville weather in February

In February, Oakville averages a high of 0°C and a low of -8°C. It gets 73 mm of precipitation over about 10 rainy days. The sun is out about 31% of daylight hours. The February record high is 18°C (2017) and the record low is -28°C (2015).

Oakville weather in March

In March, Oakville averages a high of 6°C and a low of -3°C. It gets 49 mm of precipitation over about 9 rainy days. The sun is out about 34% of daylight hours. The March record high is 26°C (2012) and the record low is -21°C (2007).

Oakville weather in April

In April, Oakville averages a high of 12°C and a low of 2°C. It gets 89 mm of precipitation over about 10 rainy days. The sun is out about 37% of daylight hours. The April record high is 31°C (2023) and the record low is -9°C (2016).

Oakville weather in May

In May, Oakville averages a high of 19°C and a low of 9°C. It gets 70 mm of precipitation over about 12 rainy days. The sun is out about 44% of daylight hours. The May record high is 33°C (2021) and the record low is -4°C (2020). May is one of the most comfortable months to visit.

Oakville weather in June

In June, Oakville averages a high of 25°C and a low of 14°C. It gets 78 mm of precipitation over about 11 rainy days. The sun is out about 48% of daylight hours. The June record high is 36°C (2022) and the record low is 6°C (2019). June is one of the most comfortable months to visit.

Oakville weather in July

In July, Oakville averages a high of 28°C and a low of 18°C. It gets 68 mm of precipitation over about 10 rainy days. The sun is out about 51% of daylight hours. The July record high is 38°C (2011) and the record low is 9°C (2010).

Oakville weather in August

In August, Oakville averages a high of 27°C and a low of 17°C. It gets 74 mm of precipitation over about 9 rainy days. The sun is out about 48% of daylight hours. The August record high is 36°C (2016) and the record low is 10°C (2017).

Oakville weather in September

In September, Oakville averages a high of 23°C and a low of 13°C. It gets 62 mm of precipitation over about 9 rainy days. The sun is out about 50% of daylight hours. The September record high is 36°C (2007) and the record low is 3°C (2020). September is one of the most comfortable months to visit.

Oakville weather in October

In October, Oakville averages a high of 16°C and a low of 7°C. It gets 82 mm of precipitation over about 15 rainy days. The sun is out about 39% of daylight hours. The October record high is 33°C (2019) and the record low is -4°C (2020).

Oakville weather in November

In November, Oakville averages a high of 8°C and a low of 1°C. It gets 56 mm of precipitation over about 10 rainy days. The sun is out about 38% of daylight hours. The November record high is 26°C (2022) and the record low is -14°C (2019).

Oakville weather in December

In December, Oakville averages a high of 2°C and a low of -4°C. It gets 66 mm of precipitation over about 11 rainy days. The sun is out about 20% of daylight hours. The December record high is 18°C (2021) and the record low is -25°C (2017).

Sunshine, humidity and wind in Oakville

July is the sunniest month in Oakville, with sunshine about 51% of daylight hours. January is the cloudiest, at 18%. Over the year the sun shines about 38% of daylight hours. Oakville is sunnier than 68% of Canada.

Humidity peaks in January at 77% and is lowest in April at 66%.

Oakville has about 10 days a year above 32°C. Oakville is hotter than 90% of Canada.

First and last freeze in Oakville

The first fall freeze in Oakville typically comes around October 29, and the last spring freeze around April 26. That leaves a frost-free growing season of about 186 days.

Oakville weather records

The hottest temperature on record at the Oakville station is 38°C, on July 21, 2011. The coldest is -28°C, on February 16, 2015.

The wettest day on record brought 87 mm of rain, on April 15, 2018.

The best time to visit Oakville

The most comfortable time to visit is typically May to June and September, when daytime highs sit near 22°C.

Winter (December–February) is cold, with average highs around 1°C and lows near -7°C. Snow is possible.

Spring (March–May) is chilly, with average highs around 12°C and lows near 3°C.

Summer (June–August) is warm, with average highs around 27°C and lows near 16°C. It can feel humid.

Autumn (September–November) is mild, with average highs around 16°C and lows near 7°C.

Oakville climate questions

How much rain does Oakville get?

Oakville gets 832 mm of precipitation in an average year, over about 126 rainy days.

What is the wettest month in Oakville?

April is the wettest month in Oakville, with 89 mm. March is the driest, with 49 mm.

How many rainy days does Oakville have a year?

Oakville has about 126 days with measurable rain in an average year. October has the most, about 15.

What is the hottest month in Oakville?

July is the warmest month in Oakville, with an average high of 28°C.

What is the coldest month in Oakville?

January is the coldest month in Oakville, with an average low of -8°C.

What is the record high temperature in Oakville?

The record high at the Oakville station is 38°C, set on July 21, 2011. The record low is -28°C, on February 16, 2015.

What is the sunniest month in Oakville?

July is the sunniest month in Oakville, with sunshine about 51% of daylight hours. January is the cloudiest.

When is the first frost in Oakville?

The first fall freeze in Oakville typically comes around October 29. The last spring freeze is around April 26.

What is the best time to visit Oakville?

The most comfortable time to visit is typically May to June and September, when daytime highs sit near 22°C.