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April Weather in Iselin, United States

Last updated: June 24, 2025

In April, the average temperature in Iselin, United States is a mild 12°C (53°F). However, temperatures can vary widely, with a minimum of -1°C (31°F) and a maximum of 29°C (85°F). Prepare for some rain, as the region sees about 111 mm (4.4 in) of precipitation over approximately 12 days. With an average humidity of 78%, expect a vibrant blend of weather that characterizes the season.

April Temperature in Iselin

In April in Iselin, the average temperature is 12°C (53°F). The maximum can reach 29°C (85°F), while the minimum can drop as low as -1°C (31°F). Pack accordingly, as you'll experience a wide range of temperatures during your travels.

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

The chart illustrates April temperature patterns in Iselin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Iselin, April typically has an average temperature of 12°C (53°F), with highs reaching up to 29°C (85°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec343743536372787670614639
Data source: Temperature data for Iselin 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 Iselin

In Iselin, in April, the precipitation amount is 111 mm (4.4 in) over a span of 12 days.

April Precipitation Trends in Iselin

The chart displays monthly precipitation patterns in Iselin, 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 Iselin, April typically receives around 111 mm (4.4 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec66107103111118941441269113082102
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Iselin

In Iselin in April, humidity is 78%. With an average temperature of 12°C (53°F), this humidity feels like a damp chill that lingers in the air, making it essential to wear layers while exploring the sights, as the cool moisture can seep into your bones and leave you feeling a bit uncomfortable if not properly dressed for the weather.

April Average Humidity in Iselin

This chart illustrates the average monthly humidity levels in Iselin, 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 Iselin is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Iselin

In Iselin in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Iselin.

Maximum UV Index Levels in Iselin for April

The chart shows the monthly maximum UV Index (UVI) for Iselin 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 Iselin typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Iselin 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 Iselin Compares to Other Months

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

This table compares monthly weather conditions in Iselin, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (35°F)66 mm (2.6 inches)84%moderate
February Weather3°C (37°F)107 mm (4.2 inches)82%moderate
March Weather6°C (43°F)103 mm (4.0 inches)81%high
April Weather12°C (53°F)111 mm (4.4 inches)78%very high
May Weather17°C (63°F)118 mm (4.6 inches)69%very high
June Weather22°C (73°F)94 mm (3.7 inches)69%very high
July Weather26°C (79°F)144 mm (5.6 inches)62%very high
August Weather25°C (77°F)126 mm (5.0 inches)65%very high
September Weather21°C (71°F)91 mm (3.6 inches)68%very high
October Weather16°C (61°F)130 mm (5.1 inches)74%high
November Weather8°C (47°F)82 mm (3.2 inches)82%moderate
December Weather4°C (39°F)102 mm (4.0 inches)80%low

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