April Weather in Washington, United States

Last updated: June 24, 2025

In April, the average temperature in Washington, United States hovers around 17°C (63°F). Expect a minimum dip to -2°C (29°F) and occasional peaks reaching 31°C (89°F). Rain lovers will find 103 mm (4.1 in) of precipitation spread over about 10 days, all while the air maintains a humidity level of 80%.

April Temperature in Washington

In April in Washington, the average temperature is 17°C (63°F), with maximums reaching up to 31°C (89°F) and minimums dropping as low as -2°C (29°F). This means that travelers should be prepared for a wide range of weather conditions during their visit.

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 17°C (63°F), with highs reaching up to 31°C (89°F) and lows dropping to around -2°C (29°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 103 mm (4.1 in) over a span of 10 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 103 mm (4.1 inches) of precipitation spread over approximately 10 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 80%. With an average temperature of 17°C (63°F), this humidity feels like you're walking through a thick, warm blanket, making travel feel slightly stifling and requiring frequent breaks to stay comfortable.

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 80%, 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 reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. 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 10, 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	7°C (45°F)	85 mm (3.4 inches)	84%	moderate
February Weather	10°C (50°F)	90 mm (3.5 inches)	81%	high
March Weather	12°C (54°F)	68 mm (2.7 inches)	80%	very high
April Weather	17°C (63°F)	103 mm (4.1 inches)	80%	very high
May Weather	21°C (71°F)	118 mm (4.6 inches)	81%	extreme
June Weather	25°C (77°F)	152 mm (6.0 inches)	82%	extreme
July Weather	27°C (80°F)	159 mm (6.3 inches)	83%	extreme
August Weather	26°C (79°F)	182 mm (7.2 inches)	82%	very high
September Weather	24°C (75°F)	147 mm (5.8 inches)	80%	very high
October Weather	19°C (67°F)	72 mm (2.8 inches)	79%	very high
November Weather	12°C (54°F)	97 mm (3.8 inches)	83%	moderate
December Weather	9°C (49°F)	108 mm (4.3 inches)	84%	moderate