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April Weather in Chantilly, United States

Last updated: June 24, 2025

In Chantilly, United States, the average temperature in April hovers around 13°C (56°F). However, be prepared for a wide range, as temperatures can dip as low as -2°C (29°F) or soar up to 32°C (90°F). With a total precipitation of 100 mm (3.9 in) spread over 12 days, and humidity levels averaging 84%, this month presents a unique blend of coolness and moisture, making it a time to dress accordingly!

April Temperature in Chantilly

In April in Chantilly, the average temperature is 13°C (56°F). The maximum can reach 32°C (90°F) and the minimum can be as low as -2°C (29°F). Be prepared for a range of temperatures and pack accordingly for your travels.

April Weather in Chantilly: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Chantilly, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chantilly, April typically has an average temperature of 13°C (56°F), with highs reaching up to 32°C (90°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec364046566675807771614640
Data source: Temperature data for Chantilly 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 Chantilly

In Chantilly in April, the precipitation amount is 100 mm (3.9 in) over the course of 12 days.

April Precipitation Trends in Chantilly

The chart displays monthly precipitation patterns in Chantilly, 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 Chantilly, April typically receives around 100 mm (3.9 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec5997831001311101261371021058792
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Chantilly

In Chantilly in April, humidity is 84%. With an average temperature of 13°C (56°F), this humidity feels like a damp blanket wrapping around you, making it feel cooler and more uncomfortable for traveling, as the air clings to your skin and weighs you down with a sense of heaviness.

April Average Humidity in Chantilly

This chart illustrates the average monthly humidity levels in Chantilly, 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 Chantilly is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%84%78%79%70%59%68%80%87%85%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Chantilly

In Chantilly 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 Chantilly.

Maximum UV Index Levels in Chantilly for April

The chart shows the monthly maximum UV Index (UVI) for Chantilly 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 Chantilly typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098753
Data source: Chantilly 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 Chantilly Compares to Other Months

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

This table compares monthly weather conditions in Chantilly, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)59 mm (2.3 inches)86%moderate
February Weather5°C (41°F)97 mm (3.8 inches)86%moderate
March Weather8°C (46°F)83 mm (3.3 inches)86%high
April Weather13°C (56°F)100 mm (3.9 inches)84%very high
May Weather19°C (66°F)131 mm (5.2 inches)78%very high
June Weather24°C (75°F)110 mm (4.3 inches)79%very high
July Weather27°C (80°F)126 mm (5.0 inches)70%very high
August Weather25°C (77°F)137 mm (5.4 inches)59%very high
September Weather22°C (71°F)102 mm (4.0 inches)68%very high
October Weather16°C (62°F)105 mm (4.1 inches)80%high
November Weather8°C (47°F)87 mm (3.4 inches)86%moderate
December Weather4°C (40°F)92 mm (3.6 inches)85%moderate

Compare Chantilly's Climate with Cities Worldwide