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April Weather in Harrisburg, United States

Last updated: June 24, 2025

In April, the average temperature in Harrisburg, United States hovers around 14°C (57°F), offering a pleasant climate. However, temperatures can range from a chilly -3°C (27°F) to a warm 31°C (87°F). Expect some humidity with an average of 80%, and be prepared for 134 mm (5.3 in) of precipitation spread across about 12 days.

April Temperature in Harrisburg

In April in Harrisburg, the average temperature is 14°C (57°F), with maximums reaching 31°C (87°F) and minimums dropping as low as -3°C (27°F). It's advisable to pack a variety of clothing to ensure comfort 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 14°C (57°F), with highs reaching up to 31°C (87°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec363949576977807773614641
Data source: Temperature data for Harrisburg generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Harrisburg

In Harrisburg in April, the precipitation amount is 134 mm (5.3 in) over a period of 12 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 134 mm (5.3 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec961151371351281209184791149088
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Harrisburg

In Harrisburg in April, humidity is 80%. With an average temperature of 14°C (57°F), this humidity feels like a warm, damp blanket wrapping around you, making travel uncomfortable and sticky, as sweat clings to your skin and the air feels heavy with moisture.

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 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%84%80%82%83%80%76%75%75%85%88%
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 reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710111110109753
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.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)96 mm (3.8 inches)86%moderate
February Weather4°C (39°F)115 mm (4.5 inches)84%high
March Weather9°C (49°F)137 mm (5.4 inches)84%high
April Weather14°C (57°F)134 mm (5.3 inches)80%very high
May Weather20°C (69°F)128 mm (5.0 inches)82%extreme
June Weather25°C (77°F)120 mm (4.7 inches)83%extreme
July Weather27°C (80°F)91 mm (3.6 inches)79%very high
August Weather25°C (78°F)84 mm (3.3 inches)76%very high
September Weather23°C (74°F)79 mm (3.1 inches)75%very high
October Weather16°C (61°F)114 mm (4.5 inches)74%high
November Weather8°C (46°F)90 mm (3.5 inches)85%moderate
December Weather5°C (42°F)88 mm (3.5 inches)88%moderate

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