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August Weather in Granby, United States

Last updated: June 24, 2025

In August, the average temperature in Granby, United States hovers around 14°C (58°F). While you might experience a refreshing minimum of 2°C (36°F), warmth can beckon with a maximum of 27°C (80°F). Be prepared for some light showers, as precipitation amounts reach 27 mm (1.1 in) across about 6 days. Expect a comfortable average humidity of 56% during your stay!

August Temperature in Granby

In August in Granby, the average temperature is 14°C (58°F). Maximums can reach 27°C (80°F), while minimums can drop as low as 2°C (36°F). This makes Granby an ideal destination for travelers seeking a pleasant climate with a mix of warm and cool days.

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 14°C (58°F), with highs reaching up to 27°C (80°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec161827313952595751352415
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 27 mm (1.1 in) over a period of 6 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 27 mm (1.1 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec385458626433252726504041
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Granby

In Granby in August humidity is 56%. With an average temperature of 14°C (58°F), this humidity feels like a refreshing embrace, making travel pleasant but slightly damp, perfect for leisurely strolls and exploring the local sights without too much discomfort.

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 56%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%81%76%67%58%52%56%65%76%82%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 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check 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 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469121313131210754
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-9°C (16°F)38 mm (1.5 inches)88%moderate
February Weather-8°C (19°F)54 mm (2.1 inches)87%high
March Weather-3°C (27°F)58 mm (2.3 inches)81%very high
April Weather0°C (32°F)62 mm (2.4 inches)76%extreme
May Weather4°C (39°F)64 mm (2.5 inches)66%extreme
June Weather11°C (52°F)33 mm (1.3 inches)58%extreme
July Weather15°C (59°F)25 mm (1.0 inches)52%extreme
August Weather14°C (58°F)27 mm (1.1 inches)56%extreme
September Weather11°C (51°F)26 mm (1.0 inches)65%very high
October Weather2°C (36°F)50 mm (2.0 inches)76%high
November Weather-4°C (24°F)40 mm (1.6 inches)82%moderate
December Weather-9°C (15°F)41 mm (1.6 inches)89%moderate

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