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July Weather in New Castle, United States

Last updated: June 24, 2025

In July, the average temperature in New Castle, United States is a pleasant 21°C (70°F). You can expect temperatures to range from a cool 4°C (39°F) at their lowest to a warm 35°C (95°F) at their peak. With just 13 mm (0.5 in) of precipitation over about 3 days, the average humidity is relatively low at 39%. Enjoy the mild climate!

July Temperature in New Castle

In July in New Castle, the average temperature is 21°C (70°F). Maximums can reach 35°C (95°F), and minimums can be as low as 4°C (39°F). This makes New Castle an ideal destination for travelers seeking pleasant weather along with opportunities for both warm and cool activities.

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

The chart illustrates July 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, July typically has an average temperature of 21°C (70°F), with highs reaching up to 35°C (95°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec212533395063706860433121
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.

July Precipitation in New Castle

In New Castle in July, the precipitation amount is 13 mm (0.5 in) over a span of 3 days.

July Precipitation Trends in New Castle

The chart displays monthly precipitation patterns in New Castle, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In New Castle, July typically receives around 13 mm (0.5 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec557361484418131318604055
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
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July Humidity in New Castle

In New Castle in July, humidity is 39%. With an average temperature of 21°C (70°F), this humidity feels like a pleasant, refreshing invitation for traveling, creating a comfortable atmosphere that enhances exploration and outdoor activities.

July Average Humidity in New Castle

This chart illustrates the average monthly humidity levels in New Castle, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in New Castle is approximately 39%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%89%81%74%58%47%39%39%53%72%84%90%
Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in New Castle

In New Castle in July, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in New Castle.

Maximum UV Index Levels in New Castle for July

The chart shows the monthly maximum UV Index (UVI) for New Castle in July, 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 July, the maximum UV index in New Castle typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469121213121210754
Data source: New Castle July 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 July 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 July’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 July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)55 mm (2.2 inches)90%moderate
February Weather-4°C (25°F)73 mm (2.9 inches)89%high
March Weather1°C (33°F)61 mm (2.4 inches)81%very high
April Weather4°C (39°F)48 mm (1.9 inches)74%extreme
May Weather10°C (50°F)43 mm (1.7 inches)58%extreme
June Weather17°C (63°F)18 mm (0.7 inches)47%extreme
July Weather21°C (70°F)13 mm (0.5 inches)39%extreme
August Weather20°C (68°F)13 mm (0.5 inches)39%extreme
September Weather16°C (60°F)18 mm (0.7 inches)53%very high
October Weather6°C (43°F)60 mm (2.4 inches)72%high
November Weather0°C (32°F)39 mm (1.6 inches)84%moderate
December Weather-6°C (22°F)55 mm (2.2 inches)90%moderate

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