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August Weather in Grantsville, United States

Last updated: June 24, 2025

In Grantsville, United States, the average temperature for August hovers around 21°C (70°F). Expect a comfortable climate with minimum temperatures dipping to 10°C (50°F) and soaring to a pleasant 32°C (89°F). While you enjoy the mild weather, be prepared for about 99 mm (3.9 in) of precipitation spread over 15 days, and a relative humidity of 59%, adding a touch of warmth to this vibrant destination.

August Temperature in Grantsville

In August in Grantsville, the average temperature is 21°C (70°F). Maximum temperatures can reach up to 32°C (89°F), while the minimum can drop as low as 10°C (50°F). This makes Grantsville an ideal destination for travelers seeking a pleasant climate.

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

The chart illustrates August temperature patterns in Grantsville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grantsville, August typically has an average temperature of 21°C (70°F), with highs reaching up to 32°C (89°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec283339495966716964543934
Data source: Temperature data for Grantsville 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 Grantsville

In Grantsville in August, the total precipitation amount is 99 mm (3.9 in) over the course of 15 days.

August Precipitation Trends in Grantsville

The chart displays monthly precipitation patterns in Grantsville, 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 Grantsville, August typically receives around 99 mm (3.9 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec881321151371551501059911911585121
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Grantsville

In Grantsville in August humidity is 59%. With an average temperature of 21°C (70°F), this humidity feels like a pleasantly warm embrace, making it ideal for leisurely strolls and outdoor activities.

August Average Humidity in Grantsville

This chart illustrates the average monthly humidity levels in Grantsville, 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 Grantsville is approximately 59%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%84%78%79%70%59%68%80%87%85%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Grantsville

In Grantsville in August, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Grantsville.

Maximum UV Index Levels in Grantsville for August

The chart shows the monthly maximum UV Index (UVI) for Grantsville 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 Grantsville typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35710101010108753
Data source: Grantsville 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 Grantsville Compares to Other Months

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

This table compares monthly weather conditions in Grantsville, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)88 mm (3.5 inches)86%moderate
February Weather1°C (33°F)132 mm (5.2 inches)86%moderate
March Weather4°C (39°F)115 mm (4.5 inches)86%high
April Weather9°C (49°F)137 mm (5.4 inches)84%very high
May Weather15°C (59°F)155 mm (6.1 inches)78%very high
June Weather19°C (67°F)150 mm (5.9 inches)79%very high
July Weather22°C (71°F)105 mm (4.1 inches)70%very high
August Weather21°C (70°F)99 mm (3.9 inches)59%very high
September Weather18°C (64°F)119 mm (4.7 inches)68%very high
October Weather12°C (54°F)115 mm (4.5 inches)80%high
November Weather4°C (40°F)85 mm (3.3 inches)86%moderate
December Weather1°C (34°F)121 mm (4.8 inches)85%moderate

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