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August Weather in Granby, Canada

Last updated: June 18, 2025

In Granby, Canada, the average temperature in August hovers around 20°C (68°F), providing a mild climate. Expect a minimum of 6°C (43°F) and a maximum of 33°C (91°F), offering a diverse range for outdoor enthusiasts. However, be prepared for 115 mm (4.5 in) of precipitation spread over 13 days, contributing to an average humidity of 75%. Whether you’re exploring nature or enjoying local culture, this month presents a unique atmospheric backdrop.

August Temperature in Granby

In August in Granby, the average temperature is 20°C (68°F). Maximum temperatures can reach 33°C (91°F) while minimums can drop as low as 6°C (43°F). This makes Granby a great destination for travelers looking to enjoy mild weather with the possibility of warm days and cool nights.

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

The chart illustrates August temperature patterns in Granby, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Granby, August typically has an average temperature of 20°C (68°F), with highs reaching up to 33°C (91°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec182028425665706860493424
Data source: Temperature data for Granby 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 Granby

In Granby in August, the precipitation amount is 115 mm (4.5 in) spread over 13 days.

August Precipitation Trends in Granby

The chart displays monthly precipitation patterns in Granby, 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 Granby, August typically receives around 115 mm (4.5 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec9184871171021171111156914112285
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

August Humidity in Granby

In Granby in August, humidity is 75%. With an average temperature of 20°C (68°F), this humidity feels like a warm, muggy embrace that can leave travelers feeling sticky and exhausted.

August Average Humidity in Granby

This chart illustrates the average monthly humidity levels in Granby, 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 Granby 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 Granby

In Granby 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 Granby.

Maximum UV Index Levels in Granby for August

The chart shows the monthly maximum UV Index (UVI) for Granby 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 Granby typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245899887532
Data source: Granby 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 Granby Compares to Other Months

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

This table compares monthly weather conditions in Granby, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (18°F)91 mm (3.6 inches)93%low
February Weather-7°C (20°F)84 mm (3.3 inches)92%moderate
March Weather-2°C (29°F)87 mm (3.4 inches)86%moderate
April Weather6°C (43°F)117 mm (4.6 inches)85%very high
May Weather13°C (56°F)102 mm (4.0 inches)80%very high
June Weather18°C (65°F)117 mm (4.6 inches)74%very high
July Weather21°C (70°F)111 mm (4.4 inches)76%very high
August Weather20°C (68°F)115 mm (4.5 inches)75%very high
September Weather16°C (60°F)69 mm (2.7 inches)78%high
October Weather10°C (49°F)141 mm (5.5 inches)86%moderate
November Weather1°C (34°F)122 mm (4.8 inches)88%moderate
December Weather-5°C (24°F)85 mm (3.3 inches)89%low

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