August Weather in Londonderry, United States

Last updated: June 24, 2025

In Londonderry, United States, the average temperature in August is a pleasant 20°C (67°F). You'll experience a range of temperatures, with a minimum of 6°C (42°F) and a maximum of 32°C (89°F). Keep in mind that the region sees an average precipitation of 120 mm (4.7 in) spread over 12 days, contributing to an average humidity level of 64%.

August Temperature in Londonderry

In August in Londonderry, the average temperature is 20°C (67°F). Maximum temperatures can reach 32°C (89°F), while the minimum can drop as low as 6°C (42°F). Overall, this month offers a pleasant climate and is ideal for exploring the sights and enjoying outdoor activities.

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

The chart illustrates August temperature patterns in Londonderry, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Londonderry, August typically has an average temperature of 20°C (67°F), with highs reaching up to 32°C (89°F) and lows dropping to around 6°C (42°F).

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

August Precipitation in Londonderry

In Londonderry in August, the precipitation amount is 120 mm (4.7 in) over a period of 12 days.

August Precipitation Trends in Londonderry

The chart displays monthly precipitation patterns in Londonderry, 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 Londonderry, August typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 12 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

August Humidity in Londonderry

In Londonderry in August, humidity is 64%. With an average temperature of 20°C (67°F), this humidity feels like a warm embrace, making it pleasant for outdoor activities but slightly uncomfortable for long walks.

August Average Humidity in Londonderry

This chart illustrates the average monthly humidity levels in Londonderry, 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 Londonderry 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 Londonderry

In Londonderry 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 Londonderry.

Maximum UV Index Levels in Londonderry for August

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

Data source: Londonderry 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 Londonderry Compares to Other Months

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

This table compares monthly weather conditions in Londonderry, 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)	78 mm (3.1 inches)	89%	moderate
February Weather	-5°C (24°F)	91 mm (3.6 inches)	88%	moderate
March Weather	-1°C (31°F)	78 mm (3.1 inches)	86%	high
April Weather	6°C (43°F)	131 mm (5.2 inches)	84%	very high
May Weather	13°C (55°F)	103 mm (4.0 inches)	76%	very high
June Weather	18°C (64°F)	114 mm (4.5 inches)	72%	very high
July Weather	21°C (69°F)	163 mm (6.4 inches)	66%	very high
August Weather	20°C (67°F)	120 mm (4.7 inches)	64%	very high
September Weather	16°C (61°F)	95 mm (3.7 inches)	72%	high
October Weather	9°C (49°F)	157 mm (6.2 inches)	81%	high
November Weather	1°C (35°F)	107 mm (4.2 inches)	87%	moderate
December Weather	-4°C (26°F)	105 mm (4.1 inches)	84%	low