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March Weather in Coos Bay, United States

Last updated: June 24, 2025

In March, the average temperature in Coos Bay, United States hovers around 8°C (47°F), with a minimum dipping down to 1°C (34°F) and a maximum reaching 19°C (66°F). Expect approximately 149 mm (5.9 in) of precipitation over about 17 days, accompanied by a high average humidity of 86%. Be sure to pack accordingly for a blend of cool and wet conditions!

March Temperature in Coos Bay

In March in Coos Bay, the average temperature is 8°C (47°F). The maximum can reach 19°C (66°F), and the minimum can be as low as 1°C (34°F). Be prepared for a mix of cool and mild weather, making it a great time for sightseeing and outdoor activities.

March Weather in Coos Bay: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Coos Bay, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Coos Bay, March typically has an average temperature of 8°C (47°F), with highs reaching up to 19°C (66°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec474547505458606160555047
Data source: Temperature data for Coos Bay 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 Coos Bay

In Coos Bay in March, the precipitation amount is 149 mm (5.9 in) spread over 17 days.

March Precipitation Trends in Coos Bay

The chart displays monthly precipitation patterns in Coos Bay, 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 Coos Bay, March typically receives around 149 mm (5.9 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec1922201491185937364870150204
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in Coos Bay

In Coos Bay in March, humidity is 86%. With an average temperature of 8°C (47°F), this humidity feels like a chilling damp that penetrates your clothes, making outdoor adventures less enjoyable and encouraging you to seek warmth indoors rather than explore the sights.

March Average Humidity in Coos Bay

This chart illustrates the average monthly humidity levels in Coos Bay, 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 Coos Bay is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%85%86%83%83%83%78%67%66%77%87%87%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Coos Bay

In Coos Bay in March, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Coos Bay, you can refer to this Hourly UV Index in Coos Bay.

Maximum UV Index Levels in Coos Bay for March

The chart shows the monthly maximum UV Index (UVI) for Coos Bay 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 Coos Bay typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec246710101098532
Data source: Coos Bay 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 Coos Bay Compares to Other Months

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

This table compares monthly weather conditions in Coos Bay, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)192 mm (7.6 inches)84%low
February Weather7°C (46°F)220 mm (8.7 inches)85%moderate
March Weather8°C (47°F)149 mm (5.9 inches)86%high
April Weather10°C (50°F)118 mm (4.6 inches)83%high
May Weather12°C (54°F)59 mm (2.3 inches)83%very high
June Weather14°C (58°F)37 mm (1.4 inches)83%very high
July Weather16°C (60°F)3 mm (0.1 inches)78%very high
August Weather16°C (61°F)6 mm (0.2 inches)67%very high
September Weather15°C (60°F)48 mm (1.9 inches)66%very high
October Weather13°C (55°F)70 mm (2.7 inches)77%moderate
November Weather10°C (51°F)150 mm (5.9 inches)87%moderate
December Weather8°C (47°F)204 mm (8.0 inches)87%low

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