April Weather in Washington, United States

Last updated: June 24, 2025

In April, the average temperature in Washington, United States hovers around 6°C (43°F). Expect temperatures to range from a chilly -5°C (24°F) at the lowest to a pleasant 21°C (70°F) at the highest. Rainfall is not uncommon, with an average precipitation of 141 mm (5.6 in) spread over 13 days. Additionally, be prepared for a rather humid environment, as the average humidity stands at a notable 81%.

April Temperature in Washington

In April in Washington, the average temperature is 6°C (43°F). Maximums can reach 21°C (70°F), and minimums can be as low as -5°C (24°F). It's advisable to pack layers to accommodate the fluctuations in temperature during your travels.

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

The chart illustrates April 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, April typically has an average temperature of 6°C (43°F), with highs reaching up to 21°C (70°F) and lows dropping to around -5°C (24°F).

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

April Precipitation in Washington

In Washington in April, the precipitation amount is 141 mm (5.6 in) spread over 13 days.

April Precipitation Trends in Washington

The chart displays monthly precipitation patterns in Washington, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Washington, April typically receives around 141 mm (5.6 inches) of precipitation spread over approximately 13 days.

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

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Millimeters (mm) Inches (in)

April Humidity in Washington

In Washington in April, humidity is 81%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill enveloping you, making every step outside seem heavier and less inviting for traveling.

April Average Humidity in Washington

This chart illustrates the average monthly humidity levels in Washington, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Washington is approximately 81%, offering insight into how humid the weather typically is during this month.

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

April UV Index in Washington

In Washington in April, 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 April

The chart shows the monthly maximum UV Index (UVI) for Washington in April, 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 April, the maximum UV index in Washington typically reaches 7, which falls under the high exposure category.

Data source: Washington April 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 April 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 April’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 April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (26°F)	97 mm (3.8 inches)	88%	low
February Weather	-3°C (27°F)	95 mm (3.7 inches)	88%	moderate
March Weather	0°C (33°F)	78 mm (3.1 inches)	85%	moderate
April Weather	6°C (43°F)	141 mm (5.6 inches)	81%	high
May Weather	11°C (53°F)	92 mm (3.6 inches)	76%	very high
June Weather	17°C (62°F)	72 mm (2.8 inches)	74%	very high
July Weather	20°C (68°F)	102 mm (4.0 inches)	74%	very high
August Weather	20°C (68°F)	81 mm (3.2 inches)	74%	very high
September Weather	17°C (62°F)	83 mm (3.2 inches)	77%	high
October Weather	11°C (52°F)	143 mm (5.6 inches)	82%	moderate
November Weather	4°C (40°F)	121 mm (4.8 inches)	85%	moderate
December Weather	-1°C (30°F)	135 mm (5.3 inches)	84%	low