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April Weather in Sussex, United States

Last updated: June 24, 2025

In Sussex, United States, the average temperature in April hovers around 16°C (61°F), with extremes ranging from a chilly -1°C (31°F) to a warm 32°C (89°F). Rainfall is quite frequent, with 109 mm (4.3 in) expected over 11 days, and the atmosphere remains humid, boasting an average humidity level of 81%.

April Temperature in Sussex

In April in Sussex, the average temperature is 16°C (61°F). Maximums can reach 32°C (89°F) and minimums can be as low as -1°C (31°F). Be prepared for a wide range of temperatures when traveling to Sussex during this time.

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

The chart illustrates April temperature patterns in Sussex, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sussex, April typically has an average temperature of 16°C (61°F), with highs reaching up to 32°C (89°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec414651616976807874645145
Data source: Temperature data for Sussex 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 Sussex

In Sussex in April, the precipitation amount is 109 mm (4.3 in), occurring over a span of 11 days.

April Precipitation Trends in Sussex

The chart displays monthly precipitation patterns in Sussex, 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 Sussex, April typically receives around 109 mm (4.3 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec84105861091151161241611131047889
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Sussex

In Sussex in April, humidity is 81%. With an average temperature of 16°C (61°F), this humidity feels like a warm, heavy blanket wrapping around you as you explore the sights, making it essential to stay hydrated and take regular breaks in the shade.

April Average Humidity in Sussex

This chart illustrates the average monthly humidity levels in Sussex, 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 Sussex is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%82%81%80%82%81%81%78%80%84%84%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Sussex

In Sussex 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 Sussex.

Maximum UV Index Levels in Sussex for April

The chart shows the monthly maximum UV Index (UVI) for Sussex 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 Sussex typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3679101011109853
Data source: Sussex 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 Sussex Compares to Other Months

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

This table compares monthly weather conditions in Sussex, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)84 mm (3.3 inches)84%moderate
February Weather8°C (47°F)105 mm (4.2 inches)83%high
March Weather10°C (51°F)85 mm (3.4 inches)82%high
April Weather16°C (61°F)109 mm (4.3 inches)81%very high
May Weather21°C (69°F)115 mm (4.5 inches)80%very high
June Weather24°C (76°F)116 mm (4.6 inches)82%very high
July Weather27°C (81°F)124 mm (4.9 inches)81%extreme
August Weather26°C (79°F)161 mm (6.3 inches)81%very high
September Weather23°C (74°F)113 mm (4.4 inches)78%very high
October Weather18°C (65°F)104 mm (4.1 inches)80%very high
November Weather10°C (51°F)78 mm (3.1 inches)84%moderate
December Weather7°C (45°F)89 mm (3.5 inches)84%moderate

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