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May Weather in South Plainfield, United States

Last updated: June 24, 2025

In South Plainfield, United States, the average temperature in May hovers around 17°C (63°F), although it can range from a chilly 1°C (35°F) to a warm 34°C (94°F). You'll want to be prepared for some rain, as the region sees 129 mm (5.1 in) of precipitation spread over 13 days. With an average humidity of 69%, expect a pleasantly moist climate that adds to the local charm.

May Temperature in South Plainfield

In May in South Plainfield, the average temperature is 17°C (63°F). Maximum temperatures can reach 34°C (94°F), while minimums can drop as low as 1°C (35°F). Be prepared for a wide range of temperatures during your travels to South Plainfield this month.

May Weather in South Plainfield: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in South Plainfield, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In South Plainfield, May typically has an average temperature of 17°C (63°F), with highs reaching up to 34°C (94°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec343743536372787670604638
Data source: Temperature data for South Plainfield 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.

May Precipitation in South Plainfield

In South Plainfield in May, the precipitation amount is 129 mm (5.1 in) over the course of 13 days.

May Precipitation Trends in South Plainfield

The chart displays monthly precipitation patterns in South Plainfield, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In South Plainfield, May typically receives around 129 mm (5.1 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec651071071101291021401338913682106
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in South Plainfield

In South Plainfield in May, humidity is 69%. With an average temperature of 17°C (63°F), this humidity feels like a warm embrace, making outdoor activities feel slightly heavier, yet still comfortable for exploring.

May Average Humidity in South Plainfield

This chart illustrates the average monthly humidity levels in South Plainfield, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in South Plainfield is approximately 69%, 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 May generated using information from the Copernicus Climate Change Service.

May UV Index in South Plainfield

In South Plainfield in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in South Plainfield.

Maximum UV Index Levels in South Plainfield for May

The chart shows the monthly maximum UV Index (UVI) for South Plainfield in May, 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 May, the maximum UV index in South Plainfield typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: South Plainfield May 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 May Weather in South Plainfield Compares to Other Months

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

This table compares monthly weather conditions in South Plainfield, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)65 mm (2.6 inches)84%moderate
February Weather3°C (37°F)107 mm (4.2 inches)82%moderate
March Weather6°C (43°F)107 mm (4.2 inches)81%high
April Weather11°C (53°F)110 mm (4.3 inches)78%very high
May Weather17°C (63°F)129 mm (5.1 inches)69%very high
June Weather22°C (72°F)102 mm (4.0 inches)69%very high
July Weather25°C (78°F)140 mm (5.5 inches)62%very high
August Weather24°C (76°F)133 mm (5.2 inches)65%very high
September Weather21°C (70°F)89 mm (3.5 inches)68%very high
October Weather16°C (60°F)136 mm (5.4 inches)74%high
November Weather8°C (46°F)82 mm (3.2 inches)82%moderate
December Weather3°C (38°F)106 mm (4.2 inches)80%low

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