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August Weather in Longueuil, Canada

Last updated: June 18, 2025

In August, the average temperature in Longueuil, Canada hovers around 21°C (70°F), with minimums dipping to 8°C (47°F) and maximums soaring to 33°C (92°F). Visitors can expect 109 mm (4.3 in) of precipitation spread over 13 days, and a humidity level of about 75%, creating a warm and somewhat humid atmosphere.

August Temperature in Longueuil

In August in Longueuil, the average temperature is 21°C (70°F), with a maximum reaching 33°C (92°F) and a minimum dropping as low as 8°C (47°F). This makes it an ideal time for travelers who enjoy mild weather and are prepared for a range of temperatures during their stay.

August Weather in Longueuil: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Longueuil, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Longueuil, August typically has an average temperature of 21°C (70°F), with highs reaching up to 33°C (92°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec171929435766727062503524
Data source: Temperature data for Longueuil generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Longueuil

In Longueuil in August, the precipitation amount is 109 mm (4.3 in), which occurs during 13 days.

August Precipitation Trends in Longueuil

The chart displays monthly precipitation patterns in Longueuil, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Longueuil, August typically receives around 109 mm (4.3 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec848284121971041031097313911888
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Longueuil

In Longueuil in August, humidity is 75%. With an average temperature of 21°C (70°F), this humidity feels like a warm, enveloping blanket that makes exploring the area feel slightly sticky, requiring travelers to stay hydrated and take occasional breaks in the shade to fully enjoy their adventures.

August Average Humidity in Longueuil

This chart illustrates the average monthly humidity levels in Longueuil, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Longueuil is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%86%85%80%74%76%75%78%86%89%89%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Longueuil

In Longueuil in August, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Longueuil.

Maximum UV Index Levels in Longueuil for August

The chart shows the monthly maximum UV Index (UVI) for Longueuil in August, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In August, the maximum UV index in Longueuil typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245799887532
Data source: Longueuil August UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How August Weather in Longueuil Compares to Other Months

Weather in Longueuil varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Longueuil, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Longueuil, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (17°F)84 mm (3.3 inches)93%low
February Weather-7°C (20°F)82 mm (3.2 inches)92%moderate
March Weather-2°C (29°F)84 mm (3.3 inches)86%moderate
April Weather6°C (43°F)121 mm (4.7 inches)85%high
May Weather14°C (57°F)97 mm (3.8 inches)80%very high
June Weather19°C (67°F)103 mm (4.1 inches)74%very high
July Weather22°C (72°F)103 mm (4.1 inches)76%very high
August Weather21°C (70°F)109 mm (4.3 inches)75%very high
September Weather16°C (62°F)73 mm (2.9 inches)78%high
October Weather10°C (50°F)139 mm (5.5 inches)86%moderate
November Weather2°C (35°F)118 mm (4.6 inches)88%moderate
December Weather-5°C (24°F)88 mm (3.5 inches)89%low

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