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May Weather in Portage, United States

Last updated: June 24, 2025

In May, the average temperature in Portage, United States hovers around 15°C (60°F). However, you might experience quite a range, with minimums dipping to -3°C (28°F) and maximums soaring to 34°C (93°F). Expect about 151 mm (5.9 in) of precipitation spread over 16 days, contributing to a high average humidity of 82%. Prepare accordingly!

May Temperature in Portage

In May in Portage, the average temperature is 15°C (60°F). The maximum can reach 34°C (93°F) and the minimum can be as low as -3°C (28°F). Be prepared for a wide range of temperatures and pack accordingly for your travels.

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

The chart illustrates May temperature patterns in Portage, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Portage, May typically has an average temperature of 15°C (60°F), with highs reaching up to 34°C (93°F) and lows dropping to around -3°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec262737476070747266533933
Data source: Temperature data for Portage 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 Portage

In Portage in May, the precipitation amount is 151 mm (5.9 in) over a span of 16 days.

May Precipitation Trends in Portage

The chart displays monthly precipitation patterns in Portage, 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 Portage, May typically receives around 151 mm (5.9 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec7276869715112011081941377265
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Portage

In Portage in May humidity is 82%. With an average temperature of 15°C (60°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel sticky and draining, which can hinder your travel experience.

May Average Humidity in Portage

This chart illustrates the average monthly humidity levels in Portage, 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 Portage is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%87%82%81%78%79%80%82%87%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Portage

In Portage 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 Portage.

Maximum UV Index Levels in Portage for May

The chart shows the monthly maximum UV Index (UVI) for Portage 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 Portage typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689101097532
Data source: Portage 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 Portage Compares to Other Months

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

This table compares monthly weather conditions in Portage, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)72 mm (2.8 inches)87%moderate
February Weather-3°C (28°F)75 mm (3.0 inches)87%moderate
March Weather3°C (38°F)86 mm (3.4 inches)86%high
April Weather8°C (47°F)97 mm (3.8 inches)87%very high
May Weather15°C (60°F)151 mm (5.9 inches)82%very high
June Weather21°C (71°F)120 mm (4.7 inches)81%very high
July Weather24°C (75°F)109 mm (4.3 inches)78%very high
August Weather22°C (72°F)81 mm (3.2 inches)79%very high
September Weather19°C (66°F)94 mm (3.7 inches)79%high
October Weather12°C (54°F)137 mm (5.4 inches)82%moderate
November Weather4°C (39°F)72 mm (2.8 inches)87%moderate
December Weather0°C (33°F)65 mm (2.6 inches)86%low

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