October Weather in Harrisburg, United States

Last updated: June 24, 2025

In October, the average temperature in Harrisburg, United States hovers around 9°C (48°F). Expect a minimum of -16°C (4°F) and a rare maximum of 30°C (87°F). During this month, the precipitation levels reach 36 mm (1.4 in) spread over 7 days, accompanied by an average humidity of 73%. Prepare accordingly for the varied weather!

October Temperature in Harrisburg

In October in Harrisburg, the average temperature is 9°C (48°F), with maximums reaching up to 30°C (87°F) and minimums dropping as low as -16°C (4°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack accordingly for both warm days and chilly nights.

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

The chart illustrates October 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, October typically has an average temperature of 9°C (48°F), with highs reaching up to 30°C (87°F) and lows dropping to around -16°C (4°F).

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

October Precipitation in Harrisburg

In Harrisburg in October, the total precipitation amount is 36 mm (1.4 in) over a span of 7 days.

October Precipitation Trends in Harrisburg

The chart displays monthly precipitation patterns in Harrisburg, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Harrisburg, October typically receives around 36 mm (1.4 inches) of precipitation spread over approximately 7 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

October Humidity in Harrisburg

In Harrisburg in October, humidity is 73%. With an average temperature of 9°C (48°F), this humidity feels like a chilly dampness that settles into your bones, making outdoor exploration feel invigorating yet a bit uncomfortable, urging travelers to bundle up while still enjoying the fresh air and vibrant scenery.

October Average Humidity in Harrisburg

This chart illustrates the average monthly humidity levels in Harrisburg, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Harrisburg is approximately 73%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Harrisburg

In Harrisburg in October, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Harrisburg, you can refer to this Hourly UV Index in Harrisburg.

Maximum UV Index Levels in Harrisburg for October

The chart shows the monthly maximum UV Index (UVI) for Harrisburg in October, 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 October, the maximum UV index in Harrisburg typically reaches 6, which falls under the high exposure category.

Data source: Harrisburg October 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 October 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 October’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 October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (32°F)	14 mm (0.6 inches)	72%	moderate
February Weather	-2°C (30°F)	23 mm (0.9 inches)	76%	moderate
March Weather	5°C (40°F)	67 mm (2.7 inches)	61%	high
April Weather	8°C (46°F)	53 mm (2.1 inches)	60%	very high
May Weather	13°C (55°F)	117 mm (4.6 inches)	74%	very high
June Weather	21°C (69°F)	57 mm (2.2 inches)	82%	extreme
July Weather	24°C (75°F)	46 mm (1.8 inches)	82%	extreme
August Weather	22°C (73°F)	35 mm (1.4 inches)	84%	very high
September Weather	19°C (66°F)	24 mm (1.0 inches)	75%	very high
October Weather	9°C (48°F)	36 mm (1.4 inches)	73%	high
November Weather	5°C (42°F)	25 mm (1.0 inches)	74%	moderate
December Weather	1°C (35°F)	18 mm (0.7 inches)	77%	moderate