August Weather in Mercersburg, United States

Last updated: June 24, 2025

In Mercersburg, United States, the average temperature in August hovers around 24°C (75°F), offering a pleasant climate. Expect a range from a cool 13°C (55°F) at night to a warm 37°C (99°F) during the day. During this month, precipitation averages 107 mm (4.2 in) over 14 days, contributing to the region's average humidity of 59%. Enjoy the diverse weather while exploring all that this vibrant locale has to offer!

August Temperature in Mercersburg

In August in Mercersburg, the average temperature is 24°C (75°F). The maximum can reach 37°C (99°F) and the minimum can be as low as 13°C (55°F). This makes it an ideal time for travelers to enjoy a variety of outdoor activities while comfortably experiencing the warm climate.

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

The chart illustrates August temperature patterns in Mercersburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mercersburg, August typically has an average temperature of 24°C (75°F), with highs reaching up to 37°C (99°F) and lows dropping to around 13°C (55°F).

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

August Precipitation in Mercersburg

In Mercersburg in August, the precipitation amount is 107 mm (4.2 in) spread over a period of 14 days.

August Precipitation Trends in Mercersburg

The chart displays monthly precipitation patterns in Mercersburg, 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 Mercersburg, August typically receives around 107 mm (4.2 inches) of precipitation spread over approximately 14 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 Mercersburg

In Mercersburg in August humidity is 59%. With an average temperature of 24°C (75°F), this humidity feels like a warm embrace, making outdoor activities refreshing yet slightly sticky, perfect for leisurely strolls but reminding travelers to stay hydrated.

August Average Humidity in Mercersburg

This chart illustrates the average monthly humidity levels in Mercersburg, 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 Mercersburg is approximately 59%, 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 Mercersburg

In Mercersburg 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 Mercersburg.

Maximum UV Index Levels in Mercersburg for August

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

Data source: Mercersburg 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 Mercersburg Compares to Other Months

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

This table compares monthly weather conditions in Mercersburg, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (34°F)	63 mm (2.5 inches)	86%	moderate
February Weather	3°C (37°F)	95 mm (3.8 inches)	86%	moderate
March Weather	6°C (43°F)	87 mm (3.4 inches)	86%	high
April Weather	12°C (54°F)	107 mm (4.2 inches)	84%	very high
May Weather	18°C (64°F)	126 mm (5.0 inches)	78%	very high
June Weather	22°C (72°F)	105 mm (4.1 inches)	79%	very high
July Weather	25°C (78°F)	130 mm (5.1 inches)	70%	very high
August Weather	24°C (75°F)	107 mm (4.2 inches)	59%	very high
September Weather	21°C (69°F)	122 mm (4.8 inches)	68%	very high
October Weather	15°C (59°F)	110 mm (4.3 inches)	80%	high
November Weather	6°C (44°F)	76 mm (3.0 inches)	86%	moderate
December Weather	3°C (38°F)	96 mm (3.8 inches)	85%	moderate