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April Weather in New Castle, United States

Last updated: June 24, 2025

In April, the average temperature in New Castle, United States hovers around 11°C (51°F). However, temperatures can fluctuate significantly, with a minimum of -6°C (21°F) and a maximum reaching 28°C (83°F). Expect 99 mm (3.9 in) of precipitation spread over 11 days, contributing to an average humidity of 84%.

April Temperature in New Castle

In April in New Castle, the average temperature is 11°C (51°F), with maximums reaching up to 28°C (83°F) and minimums dropping as low as -6°C (21°F). It's advisable to pack a variety of clothing to accommodate both warm and cold conditions during your travels.

April Weather in New Castle: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in New Castle, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In New Castle, April typically has an average temperature of 11°C (51°F), with highs reaching up to 28°C (83°F) and lows dropping to around -6°C (21°F).
JanFebMarAprMayJunJulAugSepOctNovDec293342516372757369574135
Data source: Temperature data for New Castle 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 New Castle

In New Castle, in April, the precipitation amount is 99 mm (3.9 in) over the course of 11 days.

April Precipitation Trends in New Castle

The chart displays monthly precipitation patterns in New Castle, 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 New Castle, April typically receives around 99 mm (3.9 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec79991209914012011293891029381
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in New Castle

In New Castle in April humidity is 84%. With an average temperature of 11°C (51°F), this humidity feels like a damp chill enveloping you, making it seem much colder than it actually is, and can dampen your spirits while traveling.

April Average Humidity in New Castle

This chart illustrates the average monthly humidity levels in New Castle, 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 New Castle is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%86%84%79%82%79%70%69%76%88%87%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in New Castle

In New Castle in April, 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 New Castle.

Maximum UV Index Levels in New Castle for April

The chart shows the monthly maximum UV Index (UVI) for New Castle 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 New Castle typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111098643
Data source: New Castle 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 New Castle Compares to Other Months

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

This table compares monthly weather conditions in New Castle, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)78 mm (3.1 inches)87%moderate
February Weather0°C (33°F)99 mm (3.9 inches)85%moderate
March Weather5°C (42°F)120 mm (4.7 inches)86%high
April Weather11°C (51°F)99 mm (3.9 inches)84%very high
May Weather17°C (64°F)140 mm (5.5 inches)79%very high
June Weather22°C (72°F)120 mm (4.7 inches)82%extreme
July Weather24°C (76°F)112 mm (4.4 inches)79%very high
August Weather23°C (73°F)93 mm (3.7 inches)70%very high
September Weather20°C (69°F)89 mm (3.5 inches)69%very high
October Weather14°C (57°F)101 mm (4.0 inches)76%high
November Weather5°C (41°F)93 mm (3.7 inches)88%moderate
December Weather2°C (35°F)81 mm (3.2 inches)87%moderate

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