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May Weather in Gresham, United States

Last updated: June 24, 2025

In May, the average temperature in Gresham, United States hovers around 14°C (57°F), with a range that can swing from a minimum of -2°C (29°F) to a sweltering maximum of 34°C (94°F). Expect 106 mm (4.2 in) of precipitation over about 14 days, contributing to an average humidity level of 77%. Prepare for a month that balances cool breezes and warm days, all while staying mindful of those rainy spells!

May Temperature in Gresham

In May in Gresham, the average temperature is 14°C (57°F). Maximum temperatures can reach 34°C (94°F), while minimums can drop as low as -2°C (29°F). This diverse temperature range makes Gresham a unique destination for travelers seeking both warmth and a touch of winter coolness.

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

The chart illustrates May temperature patterns in Gresham, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Gresham, May typically has an average temperature of 14°C (57°F), with highs reaching up to 34°C (94°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec191932425768726862483425
Data source: Temperature data for Gresham 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 Gresham

In Gresham in May, the precipitation amount is 106 mm (4.2 in) over a period of 14 days.

May Precipitation Trends in Gresham

The chart displays monthly precipitation patterns in Gresham, 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 Gresham, May typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec374959101106107111115771005055
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Gresham

In Gresham in May, humidity is 77%. With an average temperature of 14°C (57°F), this humidity feels like a heavy blanket wrapping around you, making outdoor exploration feel muggy and leaving you craving the shade while you travel.

May Average Humidity in Gresham

This chart illustrates the average monthly humidity levels in Gresham, 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 Gresham is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%90%87%84%77%75%75%73%78%84%89%87%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Gresham

In Gresham 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 Gresham.

Maximum UV Index Levels in Gresham for May

The chart shows the monthly maximum UV Index (UVI) for Gresham 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 Gresham typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910997532
Data source: Gresham 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 Gresham Compares to Other Months

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

This table compares monthly weather conditions in Gresham, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (19°F)37 mm (1.5 inches)89%low
February Weather-7°C (19°F)49 mm (1.9 inches)90%moderate
March Weather0°C (32°F)59 mm (2.3 inches)87%moderate
April Weather6°C (43°F)101 mm (4.0 inches)84%high
May Weather14°C (57°F)106 mm (4.2 inches)77%very high
June Weather20°C (68°F)107 mm (4.2 inches)75%very high
July Weather22°C (72°F)111 mm (4.4 inches)74%very high
August Weather20°C (69°F)115 mm (4.5 inches)73%very high
September Weather16°C (62°F)77 mm (3.0 inches)78%high
October Weather9°C (49°F)100 mm (3.9 inches)84%moderate
November Weather1°C (34°F)50 mm (2.0 inches)89%moderate
December Weather-4°C (25°F)55 mm (2.2 inches)87%low

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