August Weather in Plymouth, United States

Last updated: June 24, 2025

In August, the average temperature in Plymouth, United States is a comfortable 20°C (69°F), making it an ideal time to explore. However, be prepared for a range, as temperatures can dip to a chilly 8°C (46°F) or soar up to a scorching 34°C (93°F). Expect around 92 mm (3.6 in) of precipitation spread over 11 days, with an average humidity of 66%—perfect for a refreshing getaway!

August Temperature in Plymouth

In August in Plymouth, the average temperature is 20°C (69°F). The maximum can reach 34°C (93°F) and the minimum can be as low as 8°C (46°F). This makes it an ideal time for travelers to enjoy a variety of outdoor activities while experiencing comfortable weather.

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

The chart illustrates August temperature patterns in Plymouth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Plymouth, August typically has an average temperature of 20°C (69°F), with highs reaching up to 34°C (93°F) and lows dropping to around 8°C (46°F).

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

August Precipitation in Plymouth

In Plymouth in August, the precipitation amount is 92 mm (3.6 in) spread over 11 days.

August Precipitation Trends in Plymouth

The chart displays monthly precipitation patterns in Plymouth, 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 Plymouth, August typically receives around 92 mm (3.6 inches) of precipitation spread over approximately 11 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 Plymouth

In Plymouth in August humidity is 66%. With an average temperature of 20°C (69°F), this humidity feels like a gentle enveloping warmth, making it comfortable for traveling but with a slight stickiness that may encourage you to seek shade or refreshments frequently.

August Average Humidity in Plymouth

This chart illustrates the average monthly humidity levels in Plymouth, 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 Plymouth is approximately 66%, 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 Plymouth

In Plymouth 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 Plymouth.

Maximum UV Index Levels in Plymouth for August

The chart shows the monthly maximum UV Index (UVI) for Plymouth 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 Plymouth typically reaches 9, which falls under the very high exposure category.

Data source: Plymouth 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 Plymouth Compares to Other Months

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

This table compares monthly weather conditions in Plymouth, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (21°F)	75 mm (3.0 inches)	86%	moderate
February Weather	-5°C (24°F)	83 mm (3.3 inches)	84%	moderate
March Weather	-1°C (30°F)	73 mm (2.9 inches)	82%	moderate
April Weather	6°C (43°F)	129 mm (5.1 inches)	80%	very high
May Weather	13°C (55°F)	86 mm (3.4 inches)	72%	very high
June Weather	18°C (65°F)	100 mm (3.9 inches)	72%	very high
July Weather	21°C (70°F)	137 mm (5.4 inches)	67%	very high
August Weather	20°C (69°F)	92 mm (3.6 inches)	66%	very high
September Weather	16°C (62°F)	66 mm (2.6 inches)	71%	high
October Weather	10°C (50°F)	134 mm (5.3 inches)	78%	moderate
November Weather	2°C (36°F)	115 mm (4.5 inches)	84%	moderate
December Weather	-3°C (26°F)	115 mm (4.5 inches)	81%	low