April Weather in Harrisburg, United States

Last updated: June 24, 2025

In April, the average temperature in Harrisburg, United States hovers around 7°C (45°F). While the climate can be quite variable, be prepared for minimums as low as -17°C (1°F) and occasional highs reaching 29°C (85°F). Expect about 82 mm (3.2 in) of precipitation spread over 10 days, contributing to an average humidity of 79%. Bring your layers and an umbrella!

April Temperature in Harrisburg

In April in Harrisburg, the average temperature is 7°C (45°F). Maximums can reach 29°C (85°F), while minimums can dip as low as -17°C (1°F). Be prepared for a wide range of temperatures during your travels!

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

The chart illustrates April 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, April typically has an average temperature of 7°C (45°F), with highs reaching up to 29°C (85°F) and lows dropping to around -17°C (1°F).

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

April Precipitation in Harrisburg

In Harrisburg in April, the total precipitation amount is 82 mm (3.2 in) observed over a span of 10 days.

April Precipitation Trends in Harrisburg

The chart displays monthly precipitation patterns in Harrisburg, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Harrisburg, April typically receives around 82 mm (3.2 inches) of precipitation spread over approximately 10 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in Harrisburg

In Harrisburg in April humidity is 79%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill wrapping around you, making outdoor explorations uncomfortable and requiring extra layers for warmth while you navigate through the misty air.

April Average Humidity in Harrisburg

This chart illustrates the average monthly humidity levels in Harrisburg, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Harrisburg is approximately 79%, offering insight into how humid the weather typically is during this month.

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

April UV Index in Harrisburg

In Harrisburg in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Harrisburg.

Maximum UV Index Levels in Harrisburg for April

The chart shows the monthly maximum UV Index (UVI) for Harrisburg in April, 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 April, the maximum UV index in Harrisburg typically reaches 8, which falls under the very high exposure category.

Data source: Harrisburg April 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 April 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 April’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 April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (20°F)	21 mm (0.8 inches)	80%	low
February Weather	-7°C (20°F)	24 mm (0.9 inches)	84%	moderate
March Weather	2°C (35°F)	65 mm (2.6 inches)	75%	moderate
April Weather	7°C (45°F)	82 mm (3.2 inches)	79%	very high
May Weather	15°C (59°F)	128 mm (5.0 inches)	74%	very high
June Weather	23°C (73°F)	85 mm (3.3 inches)	81%	extreme
July Weather	24°C (75°F)	77 mm (3.0 inches)	82%	very high
August Weather	22°C (72°F)	94 mm (3.7 inches)	80%	very high
September Weather	18°C (65°F)	107 mm (4.2 inches)	75%	very high
October Weather	9°C (48°F)	79 mm (3.1 inches)	77%	moderate
November Weather	1°C (35°F)	25 mm (1.0 inches)	85%	moderate
December Weather	-3°C (26°F)	39 mm (1.5 inches)	83%	low