March Weather in Washington, United States

Last updated: June 24, 2025

In March, the average temperature in Washington, United States hovers around 18°C (65°F). Be prepared for a range of weather, with minimum temperatures dipping to -1°C (30°F) and maximums soaring up to 31°C (87°F). During this month, expect around 82 mm (3.2 in) of precipitation spread over 11 days, and don't forget to account for the high average humidity of 80%. Stay comfortable and plan your activities accordingly!

March Temperature in Washington

In March in Washington, the average temperature is 18°C (65°F). The maximum can reach 31°C (87°F), while the minimum can dip as low as -1°C (30°F). This variety in temperature makes Washington an exciting destination for travelers seeking a mix of warm days and cooler nights.

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 18°C (65°F), with highs reaching up to 31°C (87°F) and lows dropping to around -1°C (30°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 82 mm (3.2 in) over the course of 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 82 mm (3.2 inches) of precipitation spread over approximately 11 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 80%. With an average temperature of 18°C (65°F), this humidity feels like wandering through a warm, damp blanket, making every step slightly heavy and resulting in a constant sheen of sweat, which can be both refreshing and exhausting for travelers.

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 80%, 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	11°C (53°F)	109 mm (4.3 inches)	83%	moderate
February Weather	14°C (58°F)	108 mm (4.3 inches)	83%	very high
March Weather	18°C (65°F)	82 mm (3.2 inches)	80%	very high
April Weather	20°C (68°F)	155 mm (6.1 inches)	81%	extreme
May Weather	25°C (77°F)	157 mm (6.2 inches)	81%	extreme
June Weather	27°C (81°F)	148 mm (5.8 inches)	78%	extreme
July Weather	28°C (83°F)	178 mm (7.0 inches)	79%	extreme
August Weather	28°C (82°F)	170 mm (6.7 inches)	79%	extreme
September Weather	26°C (80°F)	121 mm (4.8 inches)	79%	very high
October Weather	22°C (72°F)	116 mm (4.5 inches)	77%	very high
November Weather	15°C (60°F)	78 mm (3.1 inches)	85%	high
December Weather	13°C (56°F)	113 mm (4.5 inches)	88%	moderate