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August Weather in Bristol, United States

Last updated: June 24, 2025

In August, the average temperature in Bristol, United States is a pleasant 21°C (71°F). While you might experience cooler lows of 10°C (50°F), the days can also heat up to a maximum of 34°C (94°F). With an average precipitation of 76 mm (3.0 in) spread over 8 days, you can expect occasional showers, and the humidity remains high at 83%, creating a warm and tropical atmosphere.

August Temperature in Bristol

In August in Bristol, the average temperature is 21°C (71°F). Maximum temperatures can reach 34°C (94°F), while minimums can drop to as low as 10°C (50°F). This pleasant climate makes Bristol an ideal destination for travelers seeking comfortable weather.

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

The chart illustrates August temperature patterns in Bristol, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bristol, August typically has an average temperature of 21°C (71°F), with highs reaching up to 34°C (94°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec272834445465707063534030
Data source: Temperature data for Bristol 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 Bristol

In Bristol in August, the precipitation amount is 76 mm (3.0 in) spread over a duration of 8 days.

August Precipitation Trends in Bristol

The chart displays monthly precipitation patterns in Bristol, 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 Bristol, August typically receives around 76 mm (3.0 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec87897412275651057776128111120
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Bristol

In Bristol in August humidity is 83%. With an average temperature of 21°C (71°F), this humidity feels like walking through a warm mist, making travel both refreshing and slightly uncomfortable as the air clings to your skin and you find yourself needing to take frequent breaks to hydrate.

August Average Humidity in Bristol

This chart illustrates the average monthly humidity levels in Bristol, 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 Bristol is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%86%84%79%79%86%85%83%80%77%80%81%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Bristol

In Bristol 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 Bristol.

Maximum UV Index Levels in Bristol for August

The chart shows the monthly maximum UV Index (UVI) for Bristol 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 Bristol typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910987532
Data source: Bristol 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 Bristol Compares to Other Months

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

This table compares monthly weather conditions in Bristol, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)87 mm (3.4 inches)85%low
February Weather-2°C (28°F)88 mm (3.5 inches)86%moderate
March Weather1°C (34°F)73 mm (2.9 inches)84%moderate
April Weather7°C (44°F)122 mm (4.8 inches)79%high
May Weather12°C (54°F)75 mm (2.9 inches)79%very high
June Weather18°C (65°F)65 mm (2.6 inches)86%very high
July Weather21°C (71°F)105 mm (4.1 inches)85%very high
August Weather21°C (71°F)76 mm (3.0 inches)83%very high
September Weather17°C (63°F)76 mm (3.0 inches)80%high
October Weather11°C (53°F)128 mm (5.0 inches)77%moderate
November Weather4°C (40°F)111 mm (4.4 inches)80%moderate
December Weather-1°C (31°F)120 mm (4.7 inches)81%low

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