August Weather in Bristol, United States

Last updated: June 24, 2025

In August, the average temperature in Bristol, United States hovers around 22°C (73°F), making it a pleasantly warm time of year. Expect minimum temperatures to dip to 10°C (51°F), while highs can soar up to 35°C (95°F). During this month, you'll encounter about 107 mm (4.2 in) of precipitation spread over 12 days, and the average humidity sits at a comfortable 65%.

August Temperature in Bristol

In August in Bristol, the average temperature is 22°C (73°F). Maximums can reach 35°C (95°F), while minimums can drop to as low as 10°C (51°F). This mild climate makes it an ideal time to explore and enjoy outdoor activities in Bristol.

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 22°C (73°F), with highs reaching up to 35°C (95°F) and lows dropping to around 10°C (51°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 107 mm (4.2 in) spread over 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 107 mm (4.2 inches) of precipitation spread over approximately 12 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 65%. With an average temperature of 22°C (73°F), this humidity feels like a warm embrace—comfortable yet slightly sticky, making outdoor explorations refreshing during the cooler hours while encouraging travelers to stay hydrated and seek shade during the peak sun.

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 65%, 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 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.

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	-2°C (29°F)	73 mm (2.9 inches)	84%	moderate
February Weather	0°C (32°F)	93 mm (3.7 inches)	82%	moderate
March Weather	3°C (38°F)	91 mm (3.6 inches)	81%	high
April Weather	9°C (48°F)	136 mm (5.3 inches)	78%	very high
May Weather	15°C (59°F)	120 mm (4.7 inches)	69%	very high
June Weather	20°C (69°F)	103 mm (4.1 inches)	69%	very high
July Weather	23°C (74°F)	162 mm (6.4 inches)	62%	very high
August Weather	22°C (73°F)	107 mm (4.2 inches)	65%	very high
September Weather	19°C (66°F)	122 mm (4.8 inches)	68%	very high
October Weather	13°C (56°F)	152 mm (6.0 inches)	74%	high
November Weather	5°C (42°F)	95 mm (3.7 inches)	82%	moderate
December Weather	1°C (33°F)	123 mm (4.9 inches)	80%	low