July Weather in Hyannis, United States

Last updated: June 24, 2025

In July, the average temperature in Hyannis, United States reaches a pleasant 23°C (74°F). However, be prepared for a range, as the temperatures can dip to a minimum of 10°C (50°F) and soar to a maximum of 38°C (100°F). With 63 mm (2.5 in) of precipitation spread over 9 days, you might encounter some rainy spells. Expect an average humidity of 77%, contributing to the overall climate experience. Enjoy your visit!

July Temperature in Hyannis

In July in Hyannis, the average temperature is 23°C (74°F). Maximums can reach 38°C (100°F), and minimums can be as low as 10°C (50°F). This weather makes Hyannis an ideal destination for travelers looking to enjoy warm days and cool evenings.

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

The chart illustrates July temperature patterns in Hyannis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hyannis, July typically has an average temperature of 23°C (74°F), with highs reaching up to 38°C (100°F) and lows dropping to around 10°C (50°F).

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

July Precipitation in Hyannis

In Hyannis in July, the total precipitation amount is 63 mm (2.5 in) spread over a duration of 9 days.

July Precipitation Trends in Hyannis

The chart displays monthly precipitation patterns in Hyannis, 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 Hyannis, July typically receives around 63 mm (2.5 inches) of precipitation spread over approximately 9 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 Hyannis

In Hyannis in July, humidity is 77%. With an average temperature of 23°C (74°F), this humidity feels like being enveloped in a warm, sticky blanket, making travel somewhat uncomfortable and requiring frequent hydration breaks to enjoy the sights without feeling overheated.

July Average Humidity in Hyannis

This chart illustrates the average monthly humidity levels in Hyannis, 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 Hyannis is approximately 77%, 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 Hyannis

In Hyannis in July, 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 Hyannis.

Maximum UV Index Levels in Hyannis for July

The chart shows the monthly maximum UV Index (UVI) for Hyannis 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 Hyannis typically reaches 11, which falls under the extreme exposure category.

Data source: Hyannis 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 Hyannis Compares to Other Months

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

This table compares monthly weather conditions in Hyannis, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (27°F)	14 mm (0.5 inches)	73%	moderate
February Weather	-4°C (25°F)	24 mm (0.9 inches)	80%	moderate
March Weather	3°C (38°F)	63 mm (2.5 inches)	64%	high
April Weather	7°C (44°F)	49 mm (1.9 inches)	64%	very high
May Weather	13°C (55°F)	136 mm (5.4 inches)	76%	very high
June Weather	21°C (70°F)	56 mm (2.2 inches)	79%	extreme
July Weather	23°C (74°F)	63 mm (2.5 inches)	77%	extreme
August Weather	21°C (71°F)	58 mm (2.3 inches)	79%	very high
September Weather	18°C (65°F)	46 mm (1.8 inches)	70%	very high
October Weather	8°C (46°F)	36 mm (1.4 inches)	64%	high
November Weather	3°C (38°F)	22 mm (0.9 inches)	75%	moderate
December Weather	-1°C (30°F)	21 mm (0.8 inches)	78%	moderate