July Weather in Plymouth, United States

Last updated: June 24, 2025

In July, the average temperature in Plymouth, United States is a pleasant 21°C (70°F). However, temperatures can vary significantly, dipping as low as 8°C (48°F) and soaring up to 34°C (94°F). Be prepared for some rain, as the area receives around 103 mm (4.1 in) of precipitation over approximately 12 days. With an average humidity level of 74%, the air can feel quite warm and sticky, making it essential to stay hydrated!

July Temperature in Plymouth

In July in Plymouth, the average temperature is 21°C (70°F), with maximums reaching 34°C (94°F) and minimums dropping as low as 8°C (48°F). This makes it an ideal time to explore Plymouth, allowing for comfortable outdoor activities during the day and cooler evenings for relaxation.

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

The chart illustrates July 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, July typically has an average temperature of 21°C (70°F), with highs reaching up to 34°C (94°F) and lows dropping to around 8°C (48°F).

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

July Precipitation in Plymouth

In Plymouth in July, the total precipitation amount is 103 mm (4.1 in), occurring over the course of 12 days.

July Precipitation Trends in Plymouth

The chart displays monthly precipitation patterns in Plymouth, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Plymouth, July typically receives around 103 mm (4.1 inches) of precipitation spread over approximately 12 days.

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

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Millimeters (mm) Inches (in)

July Humidity in Plymouth

In Plymouth in July humidity is 74%. With an average temperature of 21°C (70°F), this humidity feels like a warm, moist embrace, making outdoor activities both invigorating and slightly draining, so travelers should stay hydrated and take breaks often.

July Average Humidity in Plymouth

This chart illustrates the average monthly humidity levels in Plymouth, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Plymouth is approximately 74%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in Plymouth

In Plymouth in July, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Plymouth.

Maximum UV Index Levels in Plymouth for July

The chart shows the monthly maximum UV Index (UVI) for Plymouth in July, 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 July, the maximum UV index in Plymouth typically reaches 8, which falls under the very high exposure category.

Data source: Plymouth July 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 July 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 July’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 July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (21°F)	86 mm (3.4 inches)	88%	low
February Weather	-5°C (24°F)	81 mm (3.2 inches)	88%	moderate
March Weather	-1°C (31°F)	71 mm (2.8 inches)	85%	moderate
April Weather	6°C (43°F)	121 mm (4.8 inches)	81%	high
May Weather	12°C (54°F)	91 mm (3.6 inches)	76%	very high
June Weather	18°C (64°F)	75 mm (2.9 inches)	74%	very high
July Weather	21°C (70°F)	103 mm (4.1 inches)	74%	very high
August Weather	20°C (69°F)	73 mm (2.9 inches)	74%	very high
September Weather	16°C (62°F)	70 mm (2.8 inches)	77%	high
October Weather	10°C (50°F)	119 mm (4.7 inches)	82%	moderate
November Weather	2°C (36°F)	111 mm (4.4 inches)	85%	moderate
December Weather	-4°C (26°F)	113 mm (4.5 inches)	84%	low