April Weather in Washington, United States

Last updated: June 24, 2025

In Washington, United States, the average temperature in April hovers around 11°C (51°F). Expect a chilly minimum of -3°C (27°F) and a warm maximum reaching 29°C (85°F). During this time, anticipate 108 mm (4.2 in) of precipitation spread over 12 days, with an average humidity of 83%. Prepare for varied weather conditions as you explore this captivating destination!

April Temperature in Washington

In April in Washington, the average temperature is 11°C (51°F), with maximums reaching up to 29°C (85°F) and minimums dropping as low as -3°C (27°F). This makes it advisable to pack layers to prepare for varying weather conditions 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 11°C (51°F), with highs reaching up to 29°C (85°F) and lows dropping to around -3°C (27°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 total precipitation amount is 108 mm (4.2 in) spread over 12 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 108 mm (4.2 inches) of precipitation spread over approximately 12 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 83%. With an average temperature of 11°C (51°F), this humidity feels like a chilly dampness that clings to your skin, making any outdoor adventures a bit uncomfortable and best enjoyed with layered clothing and a light raincoat.

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 83%, 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 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, which falls under the very 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	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