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May Weather in The Dalles, United States

Last updated: June 24, 2025

In The Dalles, United States, the average temperature in May is a comfortable 14°C (57°F), but be prepared for a range that can dip to a chilly 0°C (33°F) and soar to a warm 32°C (90°F). Expect about 31 mm (1.2 in) of precipitation spread across 8 days, contributing to an average humidity level of 80%. Whether you're packing for sunshine or a light rain, it's a month full of varied weather!

May Temperature in The Dalles

In May in The Dalles, the average temperature is 14°C (57°F). The maximum can reach 32°C (90°F), and the minimum can be as low as 0°C (33°F). This varied climate makes The Dalles an exciting destination for travelers, offering both warm and chilly experiences.

May Weather in The Dalles: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in The Dalles, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In The Dalles, May typically has an average temperature of 14°C (57°F), with highs reaching up to 32°C (90°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec343541485664717163504135
Data source: Temperature data for The Dalles 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 The Dalles

In The Dalles in May, the precipitation amount is 31 mm (1.2 in) over the course of 8 days.

May Precipitation Trends in The Dalles

The chart displays monthly precipitation patterns in The Dalles, 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 The Dalles, May typically receives around 31 mm (1.2 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec1121237569312224345893118
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in The Dalles

In The Dalles in May, humidity is 80%. With an average temperature of 14°C (57°F), this humidity feels like a warm, damp blanket wrapping around you, making travel uncomfortable and sticky, as sweat clings to your skin and the air feels heavy with moisture.

May Average Humidity in The Dalles

This chart illustrates the average monthly humidity levels in The Dalles, 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 The Dalles is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%87%86%85%80%82%79%63%59%78%88%88%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in The Dalles

In The Dalles 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 The Dalles.

Maximum UV Index Levels in The Dalles for May

The chart shows the monthly maximum UV Index (UVI) for The Dalles 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 The Dalles typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24679101098532
Data source: The Dalles 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 The Dalles Compares to Other Months

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

This table compares monthly weather conditions in The Dalles, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)112 mm (4.4 inches)86%low
February Weather2°C (35°F)123 mm (4.8 inches)87%moderate
March Weather5°C (41°F)75 mm (3.0 inches)86%high
April Weather9°C (48°F)69 mm (2.7 inches)85%high
May Weather14°C (57°F)31 mm (1.2 inches)80%very high
June Weather18°C (64°F)22 mm (0.9 inches)82%very high
July Weather22°C (71°F)2 mm (0.1 inches)78%very high
August Weather22°C (72°F)4 mm (0.2 inches)62%very high
September Weather17°C (63°F)34 mm (1.4 inches)59%very high
October Weather10°C (50°F)58 mm (2.3 inches)78%moderate
November Weather5°C (41°F)93 mm (3.6 inches)88%moderate
December Weather1°C (35°F)118 mm (4.6 inches)88%low

Compare The Dalles's Climate with Cities Worldwide