August Weather in Harrisburg, United States

Last updated: June 24, 2025

In August, the average temperature in Harrisburg, United States is a pleasant 20°C (69°F), with temperatures ranging from a cool 7°C (44°F) to a blistering 40°C (105°F). Expect moderate precipitation of about 6 mm (0.2 in) over just 1 day, and enjoy an average humidity of 74% that adds to the overall climate experience.

August Temperature in Harrisburg

In August in Harrisburg, the average temperature is 20°C (69°F). Maximums can reach 40°C (105°F), and minimums can drop as low as 7°C (44°F). This range makes it essential for travelers to pack appropriately, ensuring they are prepared for both warm days and cooler evenings.

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

The chart illustrates August temperature patterns in Harrisburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Harrisburg, August typically has an average temperature of 20°C (69°F), with highs reaching up to 40°C (105°F) and lows dropping to around 7°C (44°F).

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

August Precipitation in Harrisburg

In Harrisburg in August, the precipitation amount is 6 mm (0.2 in) over the course of 1 day.

August Precipitation Trends in Harrisburg

The chart displays monthly precipitation patterns in Harrisburg, 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 Harrisburg, August typically receives around 6 mm (0.2 inches) of precipitation spread over approximately 1 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 Harrisburg

In Harrisburg in August, humidity is 74%. With an average temperature of 20°C (69°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities a bit sticky and requiring frequent breaks for hydration, but with the right pacing, you can still enjoy the sights and sounds of your surroundings.

August Average Humidity in Harrisburg

This chart illustrates the average monthly humidity levels in Harrisburg, 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 Harrisburg is approximately 74%, 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 Harrisburg

In Harrisburg 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 Harrisburg.

Maximum UV Index Levels in Harrisburg for August

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

Data source: Harrisburg 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 Harrisburg Compares to Other Months

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

This table compares monthly weather conditions in Harrisburg, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	160 mm (6.3 inches)	85%	low
February Weather	5°C (41°F)	192 mm (7.5 inches)	84%	moderate
March Weather	7°C (45°F)	140 mm (5.5 inches)	85%	high
April Weather	10°C (50°F)	125 mm (4.9 inches)	83%	high
May Weather	13°C (56°F)	64 mm (2.5 inches)	83%	very high
June Weather	17°C (62°F)	48 mm (1.9 inches)	83%	very high
July Weather	20°C (68°F)	2 mm (0.1 inches)	82%	very high
August Weather	20°C (69°F)	6 mm (0.2 inches)	74%	very high
September Weather	17°C (63°F)	71 mm (2.8 inches)	71%	very high
October Weather	11°C (53°F)	91 mm (3.6 inches)	81%	moderate
November Weather	8°C (46°F)	143 mm (5.6 inches)	87%	moderate
December Weather	5°C (41°F)	195 mm (7.7 inches)	87%	low