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April Weather in Mendham, United States

Last updated: June 24, 2025

In Mendham, United States, the average temperature in April is a mild 11°C (52°F). Expect a range that can dip as low as -3°C (27°F) and soar to a warm 29°C (85°F). With an average precipitation of 116 mm (4.6 in) spread over 12 days, the air tends to be quite humid, averaging 78% humidity. Be prepared for varied weather conditions!

April Temperature in Mendham

In April in Mendham, the average temperature is 11°C (52°F), with maximums reaching up to 29°C (85°F) and minimums dipping as low as -3°C (27°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates April temperature patterns in Mendham, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mendham, April typically has an average temperature of 11°C (52°F), with highs reaching up to 29°C (85°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec333641516171777568594437
Data source: Temperature data for Mendham 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 Mendham

In Mendham in April, the precipitation amount is 116 mm (4.6 in) over a span of 12 days.

April Precipitation Trends in Mendham

The chart displays monthly precipitation patterns in Mendham, 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 Mendham, April typically receives around 116 mm (4.6 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec7010410311613510614213610114286113
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Mendham

In Mendham in April humidity is 78%. With an average temperature of 11°C (52°F), this humidity feels like a damp blanket wrapping around you, making outdoor activities somewhat uncomfortable and travel more challenging as you navigate the moist air.

April Average Humidity in Mendham

This chart illustrates the average monthly humidity levels in Mendham, 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 Mendham 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 Mendham

In Mendham 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 Mendham.

Maximum UV Index Levels in Mendham for April

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

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

This table compares monthly weather conditions in Mendham, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)70 mm (2.7 inches)84%moderate
February Weather2°C (36°F)104 mm (4.1 inches)82%moderate
March Weather5°C (41°F)103 mm (4.1 inches)81%high
April Weather11°C (52°F)116 mm (4.6 inches)78%very high
May Weather16°C (62°F)135 mm (5.3 inches)69%very high
June Weather21°C (71°F)106 mm (4.2 inches)69%very high
July Weather25°C (77°F)142 mm (5.6 inches)62%very high
August Weather24°C (75°F)136 mm (5.4 inches)65%very high
September Weather20°C (69°F)101 mm (4.0 inches)68%very high
October Weather15°C (59°F)142 mm (5.6 inches)74%high
November Weather7°C (44°F)86 mm (3.4 inches)82%moderate
December Weather3°C (37°F)113 mm (4.4 inches)80%low

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