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April Weather in Harrisburg, United States

Last updated: June 24, 2025

In April in Harrisburg, United States, the average temperature is a pleasant 17°C (62°F). However, temperatures can fluctuate from a chilly -2°C (28°F) to a warm 30°C (87°F). Expect 103 mm (4.0 in) of precipitation spread over 9 days, along with an average humidity of 82%.

April Temperature in Harrisburg

In April in Harrisburg, the average temperature is 17°C (62°F). Maximums can reach 30°C (87°F), and minimums can be as low as -2°C (28°F). Be prepared for a wide range of temperatures, making it a great time to explore various activities suitable for both warm and chilly weather.

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 17°C (62°F), with highs reaching up to 30°C (87°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec434954627177817974655147
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 103 mm (4.0 in) over the course of 9 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 103 mm (4.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec9211683103113821141051339290120
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 82%. With an average temperature of 17°C (62°F), this humidity feels like a thick blanket enveloping you, making every step feel heavier and the air thicker, which can be quite exhausting for traveling.

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 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%82%83%82%80%74%75%79%87%87%
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.
JanFebMarAprMayJunJulAugSepOctNovDec46810101110109853
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 Weather6°C (44°F)92 mm (3.6 inches)86%moderate
February Weather9°C (49°F)116 mm (4.6 inches)85%high
March Weather12°C (54°F)83 mm (3.3 inches)84%very high
April Weather17°C (62°F)103 mm (4.0 inches)82%very high
May Weather22°C (71°F)113 mm (4.5 inches)83%very high
June Weather25°C (77°F)82 mm (3.2 inches)82%extreme
July Weather27°C (81°F)114 mm (4.5 inches)80%very high
August Weather26°C (79°F)105 mm (4.1 inches)74%very high
September Weather23°C (75°F)133 mm (5.2 inches)75%very high
October Weather18°C (65°F)92 mm (3.6 inches)79%very high
November Weather10°C (51°F)90 mm (3.5 inches)87%moderate
December Weather8°C (47°F)120 mm (4.7 inches)87%moderate

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