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March Weather in New Castle, United States

Last updated: June 24, 2025

In New Castle, United States during March, the average temperature hovers around 8°C (47°F). However, it can swing dramatically, with minimums plummeting to -12°C (11°F) and maximums reaching up to 27°C (81°F). Expect a fair amount of rain, with an average precipitation of 139 mm (5.5 in) over 14 days. The air also carries a high humidity level of 86%, creating a unique climate experience.

March Temperature in New Castle

In March in New Castle, the weather varies considerably, so it's essential to pack layers to stay comfortable during your travels.

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

The chart illustrates March 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, March typically has an average temperature of 8°C (47°F), with highs reaching up to 27°C (81°F) and lows dropping to around -12°C (11°F).
JanFebMarAprMayJunJulAugSepOctNovDec353947556774787571604540
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.

March Precipitation in New Castle

In New Castle, in March, the precipitation amount is 139 mm (5.5 in) over the course of 14 days.

March Precipitation Trends in New Castle

The chart displays monthly precipitation patterns in New Castle, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In New Castle, March typically receives around 139 mm (5.5 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec871291391431261591039911510692111
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in New Castle

In New Castle in March, humidity is 86%. With an average temperature of 8°C (47°F), this humidity feels like a chilling damp that penetrates your clothes, making outdoor adventures less enjoyable and encouraging you to seek warmth indoors rather than explore the sights.

March Average Humidity in New Castle

This chart illustrates the average monthly humidity levels in New Castle, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in New Castle is approximately 86%, 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 March generated using information from the Copernicus Climate Change Service.

March UV Index in New Castle

In New Castle in March, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in New Castle.

Maximum UV Index Levels in New Castle for March

The chart shows the monthly maximum UV Index (UVI) for New Castle in March, 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 March, the maximum UV index in New Castle typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101010108743
Data source: New Castle March 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 March 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 March’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 March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (35°F)87 mm (3.4 inches)87%moderate
February Weather4°C (39°F)129 mm (5.1 inches)85%moderate
March Weather8°C (47°F)139 mm (5.5 inches)86%high
April Weather13°C (56°F)143 mm (5.6 inches)84%very high
May Weather19°C (67°F)126 mm (5.0 inches)79%very high
June Weather23°C (74°F)159 mm (6.3 inches)82%very high
July Weather25°C (78°F)103 mm (4.0 inches)79%very high
August Weather24°C (76°F)99 mm (3.9 inches)70%very high
September Weather22°C (71°F)115 mm (4.5 inches)69%very high
October Weather15°C (60°F)106 mm (4.2 inches)76%high
November Weather7°C (45°F)92 mm (3.6 inches)88%moderate
December Weather5°C (40°F)111 mm (4.4 inches)87%moderate

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