August Weather in Bristol, United States

Last updated: June 24, 2025

In August, the average temperature in Bristol, United States hovers around 25°C (77°F), with a range that can dip to a cool 14°C (57°F) and soar to a steamy 35°C (96°F). Expect 137 mm (5.4 in) of rainfall spread over 15 days, contributing to an average humidity of 77%. Prepare for a month that balances warmth and moisture!

August Temperature in Bristol

In August in Bristol, the average temperature is 25°C (77°F). Maximums can reach 35°C (96°F), while minimums can drop as low as 14°C (57°F). It's a perfect time for travelers to enjoy a comfortable climate with ideal conditions for 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 25°C (77°F), with highs reaching up to 35°C (96°F) and lows dropping to around 14°C (57°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 137 mm (5.4 in) over the course of 15 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 137 mm (5.4 inches) of precipitation spread over approximately 15 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 77%. With an average temperature of 25°C (77°F), this humidity feels like a warm blanket wrapping around you, making travel feel slightly heavy but still pleasant, as long as you stay hydrated and take frequent breaks in the shade.

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 77%, 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 (36°F)	64 mm (2.5 inches)	83%	moderate
February Weather	4°C (39°F)	108 mm (4.2 inches)	82%	moderate
March Weather	7°C (44°F)	109 mm (4.3 inches)	81%	high
April Weather	12°C (54°F)	104 mm (4.1 inches)	79%	very high
May Weather	18°C (64°F)	124 mm (4.9 inches)	74%	very high
June Weather	23°C (74°F)	101 mm (4.0 inches)	77%	very high
July Weather	26°C (79°F)	136 mm (5.4 inches)	76%	very high
August Weather	25°C (77°F)	137 mm (5.4 inches)	77%	very high
September Weather	22°C (71°F)	89 mm (3.5 inches)	74%	very high
October Weather	16°C (62°F)	119 mm (4.7 inches)	75%	high
November Weather	8°C (47°F)	83 mm (3.3 inches)	80%	moderate
December Weather	4°C (40°F)	104 mm (4.1 inches)	81%	moderate