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May Weather in Brookhaven, United States

Last updated: June 24, 2025

In Brookhaven, United States, the average temperature in May hovers around 17°C (63°F), but it can swing from a brisk -2°C (29°F) to a warm 30°C (87°F). Expect about 156 mm (6.1 in) of precipitation spread over 17 days, contributing to a rather humid atmosphere with an average humidity of 82%.

May Temperature in Brookhaven

In May in Brookhaven, the average temperature is 17°C (63°F). Maximum temperatures can reach 30°C (87°F), while minimums can drop as low as -2°C (29°F). Be prepared for a wide range of weather conditions when traveling to Brookhaven during this time.

May Weather in Brookhaven: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Brookhaven, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brookhaven, May typically has an average temperature of 17°C (63°F), with highs reaching up to 30°C (87°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec333743526369747267574338
Data source: Temperature data for Brookhaven 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 Brookhaven

In Brookhaven in May, the precipitation amount is 156 mm (6.1 in), occurring over a span of 17 days.

May Precipitation Trends in Brookhaven

The chart displays monthly precipitation patterns in Brookhaven, 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 Brookhaven, May typically receives around 156 mm (6.1 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec9315011814515616113011711411790130
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Brookhaven

In Brookhaven in May, humidity is 82%. With an average temperature of 17°C (63°F), this humidity feels like a warm blanket wrapping around you—comfortable yet heavy, making outdoor activities more taxing and requiring frequent breaks for hydration.

May Average Humidity in Brookhaven

This chart illustrates the average monthly humidity levels in Brookhaven, 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 Brookhaven is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%88%87%82%84%82%73%74%81%89%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Brookhaven

In Brookhaven 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 Brookhaven.

Maximum UV Index Levels in Brookhaven for May

The chart shows the monthly maximum UV Index (UVI) for Brookhaven 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 Brookhaven typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101010108753
Data source: Brookhaven 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 Brookhaven Compares to Other Months

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

This table compares monthly weather conditions in Brookhaven, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)93 mm (3.7 inches)88%moderate
February Weather3°C (38°F)150 mm (5.9 inches)88%moderate
March Weather6°C (44°F)118 mm (4.7 inches)88%high
April Weather11°C (53°F)145 mm (5.7 inches)86%very high
May Weather17°C (63°F)156 mm (6.1 inches)82%very high
June Weather21°C (70°F)161 mm (6.3 inches)84%very high
July Weather23°C (74°F)130 mm (5.1 inches)82%very high
August Weather22°C (72°F)117 mm (4.6 inches)73%very high
September Weather20°C (68°F)114 mm (4.5 inches)73%very high
October Weather14°C (58°F)117 mm (4.6 inches)81%high
November Weather6°C (43°F)90 mm (3.5 inches)89%moderate
December Weather3°C (38°F)130 mm (5.1 inches)86%moderate

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