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May Weather in Winthrop Harbor, United States

Last updated: June 24, 2025

In May, the average temperature in Winthrop Harbor, United States hovers around 9°C (48°F), with a minimum of 1°C (34°F) and a maximum of 18°C (65°F). Expect 155 mm (6.1 in) of precipitation over approximately 13 days, while the average humidity remains high at 78%.

May Temperature in Winthrop Harbor

In May in Winthrop Harbor, the average temperature is 9°C (48°F), with maximums reaching 18°C (65°F) and minimums dropping to as low as 1°C (34°F). This mild weather makes Winthrop Harbor a great destination for travelers looking to explore without extreme temperatures.

May Weather in Winthrop Harbor: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Winthrop Harbor, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Winthrop Harbor, May typically has an average temperature of 9°C (48°F), with highs reaching up to 18°C (65°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec282835404859697166544034
Data source: Temperature data for Winthrop Harbor 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 Winthrop Harbor

In Winthrop Harbor in May, the precipitation amount is 155 mm (6.1 in) over the course of 13 days.

May Precipitation Trends in Winthrop Harbor

The chart displays monthly precipitation patterns in Winthrop Harbor, 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 Winthrop Harbor, May typically receives around 155 mm (6.1 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec787980116156966258841507168
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Winthrop Harbor

In Winthrop Harbor in May humidity is 78%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that clings to your skin, making outdoor excursions less enjoyable as you navigate the damp air.

May Average Humidity in Winthrop Harbor

This chart illustrates the average monthly humidity levels in Winthrop Harbor, 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 Winthrop Harbor is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%85%85%78%80%78%76%79%83%88%82%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Winthrop Harbor

In Winthrop Harbor in May, 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 Winthrop Harbor.

Maximum UV Index Levels in Winthrop Harbor for May

The chart shows the monthly maximum UV Index (UVI) for Winthrop Harbor 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 Winthrop Harbor typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24689101098532
Data source: Winthrop Harbor 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 Winthrop Harbor Compares to Other Months

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

This table compares monthly weather conditions in Winthrop Harbor, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)78 mm (3.1 inches)85%low
February Weather-2°C (28°F)79 mm (3.1 inches)85%moderate
March Weather1°C (35°F)80 mm (3.1 inches)85%high
April Weather4°C (40°F)116 mm (4.6 inches)85%very high
May Weather9°C (48°F)155 mm (6.1 inches)78%very high
June Weather15°C (59°F)96 mm (3.8 inches)80%very high
July Weather21°C (69°F)62 mm (2.4 inches)78%very high
August Weather22°C (71°F)58 mm (2.3 inches)76%very high
September Weather19°C (66°F)83 mm (3.3 inches)79%very high
October Weather12°C (55°F)150 mm (5.9 inches)83%moderate
November Weather5°C (41°F)70 mm (2.8 inches)88%moderate
December Weather1°C (35°F)68 mm (2.7 inches)81%low

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