Longueuil, Quebec Weather by Month and Climate Averages

How much rain does Longueuil get?

Longueuil gets 882 mm of precipitation in an average year, spread over about 133 days with measurable rain. That is more rainy days than 59% of Canada.

October is the wettest month, with 111 mm. February is the driest, with 35 mm. May has the most rainy days, about 13.

The longest dry spell in the last five years lasted 13 days, to February 1, 2022.

Longueuil weather by month

Longueuil weather in January

In January, Longueuil averages a high of -4°C and a low of -12°C. It gets 41 mm of precipitation over about 10 rainy days. The sun is out about 31% of daylight hours. The January record high is 12°C (2018) and the record low is -33°C (2022).

Longueuil weather in February

In February, Longueuil averages a high of -3°C and a low of -11°C. It gets 35 mm of precipitation over about 9 rainy days. The sun is out about 35% of daylight hours. The February record high is 16°C (2024) and the record low is -29°C (2023).

Longueuil weather in March

In March, Longueuil averages a high of 3°C and a low of -6°C. It gets 57 mm of precipitation over about 10 rainy days. The sun is out about 33% of daylight hours. The March record high is 26°C (2012) and the record low is -21°C (2014).

Longueuil weather in April

In April, Longueuil averages a high of 11°C and a low of 1°C. It gets 92 mm of precipitation over about 12 rainy days. The sun is out about 37% of daylight hours. The April record high is 29°C (2012) and the record low is -10°C (2016).

Longueuil weather in May

In May, Longueuil averages a high of 19°C and a low of 8°C. It gets 84 mm of precipitation over about 13 rainy days. The sun is out about 42% of daylight hours. The May record high is 34°C (2010) and the record low is -2°C (2023). May is one of the most comfortable months to visit.

Longueuil weather in June

In June, Longueuil averages a high of 24°C and a low of 13°C. It gets 101 mm of precipitation over about 13 rainy days. The sun is out about 39% of daylight hours. The June record high is 35°C (2023) and the record low is 2°C (2020). June is one of the most comfortable months to visit.

Longueuil weather in July

In July, Longueuil averages a high of 27°C and a low of 16°C. It gets 77 mm of precipitation over about 11 rainy days. The sun is out about 43% of daylight hours. The July record high is 36°C (2018) and the record low is 5°C (2013).

Longueuil weather in August

In August, Longueuil averages a high of 26°C and a low of 15°C. It gets 90 mm of precipitation over about 11 rainy days. The sun is out about 40% of daylight hours. The August record high is 33°C (2021) and the record low is 7°C (2020). August is one of the most comfortable months to visit.

Longueuil weather in September

In September, Longueuil averages a high of 22°C and a low of 10°C. It gets 86 mm of precipitation over about 11 rainy days. The sun is out about 46% of daylight hours. The September record high is 32°C (2010) and the record low is -1°C (2014). September is one of the most comfortable months to visit.

Longueuil weather in October

In October, Longueuil averages a high of 14°C and a low of 4°C. It gets 111 mm of precipitation over about 13 rainy days. The sun is out about 39% of daylight hours. The October record high is 30°C (2023) and the record low is -7°C (2018).

Longueuil weather in November

In November, Longueuil averages a high of 6°C and a low of -2°C. It gets 50 mm of precipitation over about 10 rainy days. The sun is out about 37% of daylight hours. The November record high is 23°C (2022) and the record low is -17°C (2012).

Longueuil weather in December

In December, Longueuil averages a high of -1°C and a low of -8°C. It gets 57 mm of precipitation over about 12 rainy days. The sun is out about 27% of daylight hours. The December record high is 17°C (2015) and the record low is -27°C (2013).

Sunshine, humidity and wind in Longueuil

September is the sunniest month in Longueuil, with sunshine about 46% of daylight hours. December is the cloudiest, at 27%. Over the year the sun shines about 37% of daylight hours. Longueuil is sunnier than 61% of Canada.

Humidity peaks in January at 79% and is lowest in May at 54%.

Longueuil has about 5 days a year above 32°C. Longueuil is hotter than 68% of Canada.

First and last freeze in Longueuil

The first fall freeze in Longueuil typically comes around October 17, and the last spring freeze around April 27. That leaves a frost-free growing season of about 173 days.

Longueuil weather records

The hottest temperature on record at the Longueuil station is 36°C, on July 2, 2018. The coldest is -33°C, on January 22, 2022.

The wettest day on record brought 106 mm of rain, on October 7, 2023.

The best time to visit Longueuil

The most comfortable time to visit is typically May to June and August to September, when daytime highs sit near 23°C.

Winter (December–February) is cold, with average highs around -3°C and lows near -11°C.

Spring (March–May) is chilly, with average highs around 11°C and lows near 1°C.

Summer (June–August) is warm, with average highs around 26°C and lows near 15°C. It can feel humid.

Autumn (September–November) is mild, with average highs around 14°C and lows near 4°C.

Longueuil climate questions

How much rain does Longueuil get?

Longueuil gets 882 mm of precipitation in an average year, over about 133 rainy days.

What is the wettest month in Longueuil?

October is the wettest month in Longueuil, with 111 mm. February is the driest, with 35 mm.

How many rainy days does Longueuil have a year?

Longueuil has about 133 days with measurable rain in an average year. May has the most, about 13.

What is the hottest month in Longueuil?

July is the warmest month in Longueuil, with an average high of 27°C.

What is the coldest month in Longueuil?

January is the coldest month in Longueuil, with an average low of -12°C.

What is the record high temperature in Longueuil?

The record high at the Longueuil station is 36°C, set on July 2, 2018. The record low is -33°C, on January 22, 2022.

What is the sunniest month in Longueuil?

September is the sunniest month in Longueuil, with sunshine about 46% of daylight hours. December is the cloudiest.

When is the first frost in Longueuil?

The first fall freeze in Longueuil typically comes around October 17. The last spring freeze is around April 27.

What is the best time to visit Longueuil?

The most comfortable time to visit is typically May to June and August to September, when daytime highs sit near 23°C.