March Weather in Washington, United States

Last updated: June 24, 2025

In Washington, United States, the average temperature in March hovers around 5°C (41°F), with thrilling extremes ranging from a chilling -18°C (0°F) to a warm 26°C (79°F). Expect about 101 mm (4.0 in) of precipitation over 11 days, contributing to an average humidity of 85%. This month offers a unique blend of cool days and potential warmth, perfect for those seeking diverse weather experiences!

March Temperature in Washington

In March in Washington, the average temperature is 5°C (41°F), with maximums reaching 26°C (79°F) and minimums dropping as low as -18°C (0°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both warm and cold weather.

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 (41°F), with highs reaching up to 26°C (79°F) and lows dropping to around -18°C (0°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 101 mm (4.0 in) spread over 11 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 101 mm (4.0 inches) of precipitation spread over approximately 11 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

March Humidity in Washington

In Washington in March, humidity is 85%. With an average temperature of 5°C (41°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration a challenge as the cold air clings to your skin.

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 85%, 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 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Washington, you can refer to this 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 6, 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	0°C (32°F)	72 mm (2.8 inches)	87%	moderate
February Weather	2°C (35°F)	105 mm (4.2 inches)	85%	moderate
March Weather	5°C (41°F)	101 mm (4.0 inches)	85%	high
April Weather	11°C (51°F)	108 mm (4.2 inches)	83%	very high
May Weather	16°C (61°F)	134 mm (5.3 inches)	75%	very high
June Weather	21°C (70°F)	100 mm (3.9 inches)	73%	very high
July Weather	25°C (77°F)	128 mm (5.0 inches)	65%	very high
August Weather	23°C (74°F)	136 mm (5.4 inches)	62%	very high
September Weather	20°C (68°F)	103 mm (4.1 inches)	66%	very high
October Weather	14°C (58°F)	130 mm (5.1 inches)	79%	high
November Weather	6°C (43°F)	89 mm (3.5 inches)	87%	moderate
December Weather	2°C (36°F)	109 mm (4.3 inches)	85%	low