August Weather in Derry, United States

Last updated: June 24, 2025

In August, the average temperature in Derry, United States hovers around 23°C (73°F). Prepare for a range of temperatures, with minimums dipping to 9°C (49°F) and maximums soaring to 37°C (100°F). Expect about 75 mm (2.9 in) of precipitation spread over 10 days, coupled with an average humidity of 66%. Stay comfortable and be ready for the climate!

August Temperature in Derry

In August in Derry, the average temperature is 23°C (73°F). Maximum temperatures can reach 37°C (100°F), while minimum temperatures can drop to as low as 9°C (49°F). Thus, it's advisable to pack layers to accommodate the fluctuating temperatures during your travels.

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

The chart illustrates August temperature patterns in Derry, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Derry, August typically has an average temperature of 23°C (73°F), with highs reaching up to 37°C (100°F) and lows dropping to around 9°C (49°F).

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

August Precipitation in Derry

In Derry in August, the precipitation amount is 75 mm (2.9 in) spread over a period of 10 days.

August Precipitation Trends in Derry

The chart displays monthly precipitation patterns in Derry, 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 Derry, August typically receives around 75 mm (2.9 inches) of precipitation spread over approximately 10 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 Derry

In Derry in August, 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.

August Average Humidity in Derry

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

In Derry 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 Derry.

Maximum UV Index Levels in Derry for August

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

Data source: Derry 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 Derry Compares to Other Months

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

This table compares monthly weather conditions in Derry, 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 (28°F)	70 mm (2.7 inches)	86%	moderate
February Weather	-1°C (30°F)	84 mm (3.3 inches)	84%	moderate
March Weather	2°C (36°F)	82 mm (3.2 inches)	82%	moderate
April Weather	8°C (47°F)	128 mm (5.0 inches)	80%	very high
May Weather	15°C (58°F)	77 mm (3.0 inches)	72%	very high
June Weather	20°C (69°F)	89 mm (3.5 inches)	72%	very high
July Weather	23°C (74°F)	135 mm (5.3 inches)	67%	very high
August Weather	23°C (73°F)	75 mm (2.9 inches)	66%	very high
September Weather	19°C (66°F)	72 mm (2.8 inches)	71%	high
October Weather	12°C (54°F)	125 mm (4.9 inches)	78%	moderate
November Weather	4°C (40°F)	99 mm (3.9 inches)	84%	moderate
December Weather	-1°C (31°F)	122 mm (4.8 inches)	81%	low