August Weather in Bristol, United States

Last updated: June 24, 2025

In Bristol, United States, the average temperature in August is a warm 27°C (81°F). Expect daily variations with minimum temperatures dropping to 19°C (66°F) and soaring to a maximum of 36°C (97°F). Rainfall is notable, with an average precipitation of 191 mm (7.5 in) spread over 23 days, contributing to a high average humidity of 78%. Stay prepared for a mix of warmth and wet weather!

August Temperature in Bristol

In August in Bristol, the average temperature is 27°C (81°F), with maximums reaching 36°C (97°F) and minimums dropping to as low as 19°C (66°F). This pleasant weather makes it an ideal time for travelers to explore and enjoy outdoor activities.

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 27°C (81°F), with highs reaching up to 36°C (97°F) and lows dropping to around 19°C (66°F).

Data source: Temperature data for Bristol generated using information from the Copernicus Climate Change Service.

August Precipitation in Bristol

In Bristol in August, the precipitation amount is 191 mm (7.5 in) over the course of 23 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 191 mm (7.5 inches) of precipitation spread over approximately 23 days.

Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

August Humidity in Bristol

In Bristol in August humidity is 78%. With an average temperature of 27°C (81°F), this humidity feels like a warm, heavy embrace that makes traveling feel both invigorating and exhausting. Moments spent outside can quickly become clammy and uncomfortable, urging travelers to seek shade and hydration as they explore.

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 78%, offering insight into how humid the weather typically is during this month.

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 reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, 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 11, which falls under the extreme exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	84 mm (3.3 inches)	83%	moderate
February Weather	15°C (60°F)	122 mm (4.8 inches)	82%	very high
March Weather	17°C (64°F)	57 mm (2.2 inches)	79%	very high
April Weather	20°C (68°F)	107 mm (4.2 inches)	77%	very high
May Weather	24°C (75°F)	103 mm (4.1 inches)	74%	extreme
June Weather	26°C (80°F)	181 mm (7.1 inches)	70%	extreme
July Weather	27°C (81°F)	173 mm (6.8 inches)	78%	extreme
August Weather	27°C (81°F)	191 mm (7.5 inches)	78%	extreme
September Weather	26°C (79°F)	152 mm (6.0 inches)	79%	very high
October Weather	23°C (73°F)	100 mm (3.9 inches)	74%	very high
November Weather	16°C (60°F)	46 mm (1.8 inches)	83%	high
December Weather	13°C (56°F)	126 mm (5.0 inches)	86%	moderate