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August Weather in Markham, Canada

Last updated: June 18, 2025

In August, the average temperature in Markham, Canada hovers around 21°C (71°F), with minimums dipping to 13°C (56°F) and maximums rising to 28°C (83°F). Be prepared for some rain, as 76 mm (3.0 in) of precipitation can be expected over 11 days this month, contributing to an average humidity of 72%.

August Temperature in Markham

In August in Markham, the average temperature is 21°C (71°F). The maximum can reach 28°C (83°F) while the minimum can drop to a cool 13°C (56°F). This pleasant climate makes Markham an ideal destination for enjoyable outdoor activities and sightseeing.

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

The chart illustrates August temperature patterns in Markham, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Markham, August typically has an average temperature of 21°C (71°F), with highs reaching up to 28°C (83°F) and lows dropping to around 13°C (56°F).
JanFebMarAprMayJunJulAugSepOctNovDec272733415061707065544032
Data source: Temperature data for Markham 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 Markham

In Markham in August, the total precipitation amount is 76 mm (3.0 in), recorded over a period of 11 days.

August Precipitation Trends in Markham

The chart displays monthly precipitation patterns in Markham, 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 Markham, August typically receives around 76 mm (3.0 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec808375118103807376691159691
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Markham

In Markham in August, humidity is 72%. With an average temperature of 21°C (71°F), this humidity feels like a warm embrace, creating a thick, sultry atmosphere that can be quite heavy for traveling.

August Average Humidity in Markham

This chart illustrates the average monthly humidity levels in Markham, 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 Markham is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%91%88%88%82%80%77%72%76%83%88%87%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Markham

In Markham 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 Markham.

Maximum UV Index Levels in Markham for August

The chart shows the monthly maximum UV Index (UVI) for Markham 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 Markham typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245899987532
Data source: Markham 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 Markham Compares to Other Months

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

This table compares monthly weather conditions in Markham, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)80 mm (3.2 inches)91%low
February Weather-3°C (28°F)83 mm (3.3 inches)91%moderate
March Weather0°C (33°F)75 mm (2.9 inches)88%moderate
April Weather5°C (41°F)118 mm (4.6 inches)88%very high
May Weather10°C (50°F)103 mm (4.1 inches)82%very high
June Weather16°C (62°F)80 mm (3.1 inches)79%very high
July Weather21°C (71°F)73 mm (2.9 inches)77%very high
August Weather21°C (71°F)76 mm (3.0 inches)72%very high
September Weather18°C (65°F)69 mm (2.7 inches)76%high
October Weather12°C (54°F)115 mm (4.5 inches)83%moderate
November Weather4°C (40°F)96 mm (3.8 inches)88%moderate
December Weather0°C (33°F)91 mm (3.6 inches)87%low

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