March Weather in Washington, United States

Last updated: June 24, 2025

In March, the average temperature in Washington, United States is a brisk 5°C (42°F). Temperatures can swing dramatically, with a minimum of -19°C (-1°F) and occasional highs reaching 25°C (78°F). Expect around 108 mm (4.3 in) of precipitation spread over 12 days, while humidity hovers at a notable 84%. Stay prepared for the unpredictable!

March Temperature in Washington

In March in Washington, the average temperature is 5°C (42°F), with maximums reaching up to 25°C (78°F) and minimums dropping as low as -19°C (-1°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both warm and cold conditions.

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 5°C (42°F), with highs reaching up to 25°C (78°F) and lows dropping to around -19°C (-1°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 108 mm (4.3 in) over the course of 12 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 108 mm (4.3 inches) of precipitation spread over approximately 12 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 84%. With an average temperature of 5°C (42°F), this humidity feels like a thick blanket wrapping around you, making every step feel heavier while traveling.

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 84%, 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 is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, 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 7, which falls under the high 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	-3°C (27°F)	61 mm (2.4 inches)	82%	moderate
February Weather	-2°C (29°F)	67 mm (2.7 inches)	83%	moderate
March Weather	5°C (42°F)	108 mm (4.3 inches)	84%	high
April Weather	10°C (51°F)	116 mm (4.6 inches)	85%	very high
May Weather	18°C (64°F)	167 mm (6.6 inches)	79%	very high
June Weather	23°C (74°F)	148 mm (5.8 inches)	82%	extreme
July Weather	25°C (77°F)	107 mm (4.2 inches)	80%	very high
August Weather	23°C (74°F)	74 mm (2.9 inches)	81%	very high
September Weather	21°C (70°F)	71 mm (2.8 inches)	80%	very high
October Weather	13°C (56°F)	131 mm (5.2 inches)	82%	high
November Weather	4°C (40°F)	57 mm (2.3 inches)	88%	moderate
December Weather	1°C (34°F)	55 mm (2.2 inches)	84%	low