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June Weather in New Castle, United States

Last updated: June 24, 2025

In New Castle, United States, the average temperature for June hovers around 21°C (70°F), making it a pleasant time to explore. Expect temperatures to vary, with lows of 8°C (47°F) and highs reaching 32°C (91°F). However, be prepared for some rain, as precipitation averages 117 mm (4.6 in) over 12 days. The air can feel quite humid, with an average humidity level of 83%, adding a tropical touch to your stay.

June Temperature in New Castle

In June in New Castle, the average temperature is 21°C (70°F). Maximums can reach 32°C (91°F), and minimums can be as low as 8°C (47°F). This pleasant weather makes New Castle a great destination for outdoor activities and exploration.

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

The chart illustrates June 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, June typically has an average temperature of 21°C (70°F), with highs reaching up to 32°C (91°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec354045546370757368584439
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.

June Precipitation in New Castle

In New Castle in June, the total precipitation amount is 117 mm (4.6 in), occurring over a span of 12 days.

June Precipitation Trends in New Castle

The chart displays monthly precipitation patterns in New Castle, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In New Castle, June typically receives around 117 mm (4.6 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec7411182120147117781091141147598
Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.
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June Humidity in New Castle

In New Castle in June humidity is 83%. With an average temperature of 21°C (70°F), this humidity feels like you’re enveloped in a warm, tropical embrace, making it essential to stay hydrated and take breaks during your travels.

June Average Humidity in New Castle

This chart illustrates the average monthly humidity levels in New Castle, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in New Castle is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%84%83%83%79%66%68%78%89%86%
Data source: Humidity data for June generated using information from the Copernicus Climate Change Service.

June UV Index in New Castle

In New Castle in June, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in New Castle.

Maximum UV Index Levels in New Castle for June

The chart shows the monthly maximum UV Index (UVI) for New Castle in June, 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 June, the maximum UV index in New Castle typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36810101111109753
Data source: New Castle June 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 June 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 June’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 June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)73 mm (2.9 inches)87%moderate
February Weather5°C (41°F)111 mm (4.4 inches)87%high
March Weather7°C (46°F)82 mm (3.2 inches)86%very high
April Weather12°C (55°F)120 mm (4.7 inches)84%very high
May Weather17°C (64°F)147 mm (5.8 inches)83%very high
June Weather21°C (70°F)117 mm (4.6 inches)83%extreme
July Weather24°C (75°F)78 mm (3.1 inches)79%extreme
August Weather23°C (73°F)109 mm (4.3 inches)66%very high
September Weather20°C (68°F)114 mm (4.5 inches)68%very high
October Weather15°C (58°F)114 mm (4.5 inches)78%high
November Weather6°C (44°F)75 mm (3.0 inches)89%moderate
December Weather4°C (39°F)98 mm (3.9 inches)86%moderate

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