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August Weather in Bristol, United States

Last updated: June 24, 2025

In Bristol, United States, the average temperature in August is a comfortable 20°C (69°F), with a range that can dip as low as 6°C (42°F) or soar up to 32°C (91°F). Expect 92 mm (3.6 in) of precipitation spread over 12 days, giving the month a 75% average humidity that adds a touch of warmth to the air.

August Temperature in Bristol

In August in Bristol, the average temperature is 20°C (69°F). Maximum temperatures can reach 32°C (91°F), while minimums can drop as low as 6°C (42°F). It's advisable to pack a mix of light layers and warmer clothing to accommodate the varying temperatures during your travels.

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 20°C (69°F), with highs reaching up to 32°C (91°F) and lows dropping to around 6°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec202330435665706861503526
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 92 mm (3.6 in) over the course of 12 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 92 mm (3.6 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec7979731099299110926714210479
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 75%. With an average temperature of 20°C (69°F), this humidity feels like a warm, enveloping blanket, making travel a bit muggy and requiring frequent hydration breaks to stay comfortable while exploring.

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 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 Bristol

In Bristol in August, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
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-7°C (20°F)79 mm (3.1 inches)93%low
February Weather-5°C (23°F)79 mm (3.1 inches)92%moderate
March Weather-1°C (31°F)73 mm (2.9 inches)86%moderate
April Weather6°C (43°F)108 mm (4.3 inches)85%very high
May Weather13°C (56°F)92 mm (3.6 inches)80%very high
June Weather18°C (65°F)99 mm (3.9 inches)74%very high
July Weather21°C (70°F)110 mm (4.3 inches)76%very high
August Weather20°C (69°F)92 mm (3.6 inches)75%very high
September Weather16°C (61°F)67 mm (2.6 inches)78%high
October Weather10°C (50°F)142 mm (5.6 inches)86%moderate
November Weather2°C (35°F)103 mm (4.1 inches)88%moderate
December Weather-3°C (26°F)79 mm (3.1 inches)89%low

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