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May Weather in Sequim, United States

Last updated: June 24, 2025

In May, the average temperature in Sequim, United States is a cool 11°C (51°F), with a minimum of 2°C (36°F) and a maximum reaching up to 22°C (71°F). Expect some wet days, as 93 mm (3.7 in) of precipitation is recorded over about 14 days. The air tends to be quite humid, with an average humidity level of 84%. Prepare accordingly for a mix of chilly and damp weather!

May Temperature in Sequim

In May in Sequim, the average temperature is 11°C (51°F). Maximum temperatures can reach 22°C (71°F), while the minimum can drop as low as 2°C (36°F). Therefore, travelers should prepare for a mix of mild and cooler weather while exploring the area.

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

The chart illustrates May temperature patterns in Sequim, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sequim, May typically has an average temperature of 11°C (51°F), with highs reaching up to 22°C (71°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec383639445155606156474238
Data source: Temperature data for Sequim 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 Sequim

In Sequim, in May, the precipitation amount is 93 mm (3.7 in) over the course of 14 days.

May Precipitation Trends in Sequim

The chart displays monthly precipitation patterns in Sequim, 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 Sequim, May typically receives around 93 mm (3.7 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec182151128119931184945123143199193
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Sequim

In Sequim in May humidity is 84%. With an average temperature of 11°C (51°F), this humidity feels like a damp chill enveloping you, making it seem much colder than it actually is, and can dampen your spirits while traveling.

May Average Humidity in Sequim

This chart illustrates the average monthly humidity levels in Sequim, 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 Sequim is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%85%83%84%84%82%73%74%83%86%87%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Sequim

In Sequim in May, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Sequim.

Maximum UV Index Levels in Sequim for May

The chart shows the monthly maximum UV Index (UVI) for Sequim 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 Sequim typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689987532
Data source: Sequim 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 Sequim Compares to Other Months

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

This table compares monthly weather conditions in Sequim, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)182 mm (7.2 inches)86%low
February Weather2°C (36°F)150 mm (5.9 inches)84%moderate
March Weather4°C (40°F)128 mm (5.1 inches)85%moderate
April Weather7°C (44°F)119 mm (4.7 inches)83%high
May Weather11°C (51°F)93 mm (3.7 inches)84%very high
June Weather13°C (56°F)118 mm (4.6 inches)84%very high
July Weather15°C (60°F)49 mm (1.9 inches)82%very high
August Weather16°C (61°F)45 mm (1.8 inches)73%very high
September Weather13°C (56°F)122 mm (4.8 inches)74%high
October Weather9°C (48°F)143 mm (5.6 inches)83%moderate
November Weather6°C (42°F)199 mm (7.8 inches)86%moderate
December Weather3°C (38°F)193 mm (7.6 inches)87%low

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