March Weather in Washington, United States

Last updated: June 24, 2025

In March, the average temperature in Washington, United States hovers around -1°C (30°F). Expect chilly extremes, with minimums plunging to -19°C (-2°F) and maximums only reaching 7°C (44°F). The weather is marked by 87% humidity and a precipitation total of 61 mm (2.4 in) occurring over 9 days, making this month a time to bundle up and prepare for wet conditions!

March Temperature in Washington

In March in Washington, the average temperature is -1°C (30°F). The maximum can reach 7°C (44°F), while the minimum can be as low as -19°C (-2°F). Travelers should prepare for cold conditions and pack appropriate winter clothing.

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

The chart illustrates March temperature patterns in Washington, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Washington, March typically has an average temperature of -1°C (30°F), with highs reaching up to 7°C (44°F) and lows dropping to around -19°C (-2°F).

Data source: Temperature data for Washington generated using information from the Copernicus Climate Change Service.

March Precipitation in Washington

In Washington in March, the precipitation amount is 61 mm (2.4 in) spread over 9 days.

March Precipitation Trends in Washington

The chart displays monthly precipitation patterns in Washington, 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 Washington, March typically receives around 61 mm (2.4 inches) of precipitation spread over approximately 9 days.

Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

March Humidity in Washington

In Washington in March, humidity is 87%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill that penetrates through layers of clothing, making travel uncomfortable as the dampness clings to your skin, intensifying the cold and causing every gust of wind to feel even more frigid.

March Average Humidity in Washington

This chart illustrates the average monthly humidity levels in Washington, 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 Washington is approximately 87%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Washington

In Washington 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 Washington.

Maximum UV Index Levels in Washington for March

The chart shows the monthly maximum UV Index (UVI) for Washington 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 Washington typically reaches 5, which falls under the moderate exposure category.

Data source: Washington 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 Washington Compares to Other Months

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

This table compares monthly weather conditions in Washington, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (24°F)	44 mm (1.7 inches)	91%	low
February Weather	-5°C (23°F)	56 mm (2.2 inches)	91%	moderate
March Weather	-1°C (30°F)	61 mm (2.4 inches)	87%	moderate
April Weather	2°C (36°F)	90 mm (3.5 inches)	87%	high
May Weather	7°C (45°F)	83 mm (3.3 inches)	82%	very high
June Weather	14°C (57°F)	90 mm (3.5 inches)	79%	very high
July Weather	20°C (68°F)	76 mm (3.0 inches)	75%	very high
August Weather	20°C (68°F)	87 mm (3.4 inches)	76%	very high
September Weather	17°C (62°F)	85 mm (3.4 inches)	79%	high
October Weather	11°C (51°F)	114 mm (4.5 inches)	83%	moderate
November Weather	3°C (38°F)	67 mm (2.6 inches)	86%	moderate
December Weather	-1°C (30°F)	70 mm (2.8 inches)	87%	low