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March Weather in Sequim, United States

Last updated: June 24, 2025

In March, the average temperature in Sequim, United States hovers around 4°C (40°F). Expect a minimum drop to -6°C (21°F) and a pleasant high of 17°C (64°F). You'll likely experience 128 mm (5.1 in) of precipitation over 19 days, accompanied by a notably high average humidity of 85%.

March Temperature in Sequim

In March in Sequim, the average temperature is 4°C (40°F), with maximums reaching 17°C (64°F) and minimums dropping as low as -6°C (21°F). Travelers should be prepared for a chilly climate with the possibility of milder daytime temperatures, making layered clothing a smart choice.

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

The chart illustrates March 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, March typically has an average temperature of 4°C (40°F), with highs reaching up to 17°C (64°F) and lows dropping to around -6°C (21°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.

March Precipitation in Sequim

In Sequim in March, the total precipitation amount is 128 mm (5.1 in) recorded over the course of 19 days.

March Precipitation Trends in Sequim

The chart displays monthly precipitation patterns in Sequim, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Sequim, March typically receives around 128 mm (5.1 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec182151128119931184945123143199193
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in Sequim

In Sequim in March, humidity is 85%. With an average temperature of 4°C (40°F), this humidity feels like an icy blanket wrapping around you, making outdoor activities feel much colder and damp, which can be quite uncomfortable for traveling.

March Average Humidity in Sequim

This chart illustrates the average monthly humidity levels in Sequim, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Sequim is approximately 85%, 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 March generated using information from the Copernicus Climate Change Service.

March UV Index in Sequim

In Sequim in March, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Sequim.

Maximum UV Index Levels in Sequim for March

The chart shows the monthly maximum UV Index (UVI) for Sequim in March, 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 March, the maximum UV index in Sequim typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689987532
Data source: Sequim March 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 March 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 March’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 March’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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