March Weather in Washington, United States

Last updated: June 24, 2025

In March, the average temperature in Washington, United States hovers around 14°C (58°F). Expect fluctuations, with minimums dropping to -5°C (22°F) and maximums reaching up to 30°C (86°F). Rainfall is a possibility, with an average precipitation of 87 mm (3.4 in) spread over approximately 10 days. The air feels quite humid, with an average humidity level of 83%.

March Temperature in Washington

In March in Washington, the average temperature is 14°C (58°F). Maximum temperatures can reach 30°C (86°F), while minimums can dip as low as -5°C (22°F). This makes Washington a destination with varied weather, so travelers should be prepared for both warm and chilly 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 14°C (58°F), with highs reaching up to 30°C (86°F) and lows dropping to around -5°C (22°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 87 mm (3.4 in) over the course of 10 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 87 mm (3.4 inches) of precipitation spread over approximately 10 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 83%. With an average temperature of 14°C (58°F), this humidity feels like a thick blanket enveloping you, making exploration feel heavier and sweatier, so be prepared for a slower pace 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 83%, 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 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For 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 9, which falls under the very 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	9°C (48°F)	100 mm (3.9 inches)	86%	moderate
February Weather	12°C (53°F)	117 mm (4.6 inches)	84%	high
March Weather	14°C (58°F)	87 mm (3.4 inches)	83%	very high
April Weather	18°C (65°F)	107 mm (4.2 inches)	81%	very high
May Weather	23°C (73°F)	109 mm (4.3 inches)	81%	extreme
June Weather	26°C (79°F)	97 mm (3.8 inches)	81%	extreme
July Weather	27°C (82°F)	105 mm (4.1 inches)	83%	extreme
August Weather	27°C (81°F)	125 mm (4.9 inches)	81%	very high
September Weather	25°C (77°F)	98 mm (3.9 inches)	82%	very high
October Weather	20°C (68°F)	112 mm (4.4 inches)	78%	very high
November Weather	12°C (54°F)	82 mm (3.2 inches)	86%	high
December Weather	10°C (50°F)	117 mm (4.6 inches)	89%	moderate