July Weather in Greenwich, United States

Last updated: June 24, 2025

In July, the average temperature in Greenwich, United States is a comfortable 23°C (73°F). However, be prepared for temperature fluctuations, as it can dip to a chilly 10°C (50°F) or climb to a sweltering 35°C (96°F). Rain is a possibility, with an average precipitation of 108 mm (4.3 in) spread over 13 days. Overall, you can expect a 66% humidity, ensuring a warm and somewhat sticky atmosphere.

July Temperature in Greenwich

In July in Greenwich, the average temperature is 23°C (73°F), with maximums reaching up to 35°C (96°F) and minimums dipping as low as 10°C (50°F). It's a great time to travel here, offering warm days and cool nights that make for perfect exploration and relaxation.

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

The chart illustrates July 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, July typically has an average temperature of 23°C (73°F), with highs reaching up to 35°C (96°F) and lows dropping to around 10°C (50°F).

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

July Precipitation in Greenwich

In Greenwich in July, the precipitation amount is 108 mm (4.3 in), occurring over a span of 13 days.

July Precipitation Trends in Greenwich

The chart displays monthly precipitation patterns in Greenwich, 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 Greenwich, July typically receives around 108 mm (4.3 inches) of precipitation spread over approximately 13 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 Greenwich

In Greenwich in July, humidity is 66%. With an average temperature of 23°C (73°F), this humidity feels like a warm embrace, making it essential for travelers to stay hydrated and plan outdoor activities for cooler times of the day.

July Average Humidity in Greenwich

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

In Greenwich in July, 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 July

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

Data source: Greenwich 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 Greenwich Compares to Other Months

Weather in Greenwich varies notably across the year, with each month offering distinct climate conditions. This page compares July’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 July’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