August Weather in Greenwich, United States

Last updated: June 24, 2025

In Greenwich, United States, the average temperature in August hovers around 22°C (72°F), with the minimum dipping to 8°C (46°F) and the maximum soaring to 34°C (93°F). Expect around 80 mm (3.2 in) of precipitation spread over 9 days, and experience an average humidity level of 64%.

August Temperature in Greenwich

In August in Greenwich, the average temperature is 22°C (72°F). The maximum can reach 34°C (93°F), and the minimum can be as low as 8°C (46°F). This makes Greenwich an ideal destination for travelers looking to enjoy mild weather while exploring outdoor activities.

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

The chart illustrates August temperature patterns in Greenwich, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Greenwich, August typically has an average temperature of 22°C (72°F), with highs reaching up to 34°C (93°F) and lows dropping to around 8°C (46°F).

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

August Precipitation in Greenwich

In Greenwich in August, the total precipitation amount is 80 mm (3.2 in) over the course of 9 days.

August Precipitation Trends in Greenwich

The chart displays monthly precipitation patterns in Greenwich, 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 Greenwich, August typically receives around 80 mm (3.2 inches) of precipitation spread over approximately 9 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 Greenwich

In Greenwich in August humidity is 64%. With an average temperature of 22°C (72°F), this humidity feels like a warm, tropical embrace, making travel enjoyable yet slightly sticky, prompting visitors to seek shade or refreshing beverages while exploring the vibrant surroundings.

August Average Humidity in Greenwich

This chart illustrates the average monthly humidity levels in Greenwich, 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 Greenwich is approximately 64%, 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 Greenwich

In Greenwich 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 Greenwich.

Maximum UV Index Levels in Greenwich for August

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

Data source: Greenwich 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 Greenwich Compares to Other Months

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

This table compares monthly weather conditions in Greenwich, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (26°F)	77 mm (3.0 inches)	89%	moderate
February Weather	-2°C (29°F)	95 mm (3.8 inches)	88%	moderate
March Weather	2°C (35°F)	79 mm (3.1 inches)	86%	high
April Weather	8°C (47°F)	121 mm (4.8 inches)	84%	very high
May Weather	15°C (59°F)	89 mm (3.5 inches)	76%	very high
June Weather	20°C (68°F)	82 mm (3.2 inches)	72%	very high
July Weather	23°C (73°F)	108 mm (4.3 inches)	66%	very high
August Weather	22°C (72°F)	80 mm (3.2 inches)	64%	very high
September Weather	18°C (64°F)	87 mm (3.4 inches)	72%	high
October Weather	12°C (53°F)	142 mm (5.6 inches)	81%	moderate
November Weather	4°C (39°F)	106 mm (4.2 inches)	87%	moderate
December Weather	-1°C (31°F)	99 mm (3.9 inches)	84%	low