April Weather in Washington, United States

Last updated: June 24, 2025

In April, the average temperature in Washington, United States is a comfortable 13°C (55°F). However, temperatures can vary drastically, with minimums plummeting to -3°C (26°F) and maximums soaring to 33°C (92°F). This month experiences 105 mm (4.1 in) of precipitation over approximately 11 days, contributing to an average humidity level of 84%. Prepare for a mix of weather as you explore the unique charm of Washington!

April Temperature in Washington

In April in Washington, the average temperature is 13°C (55°F), with maximums reaching 33°C (92°F) and minimums dropping as low as -3°C (26°F). This variation in temperature makes it essential for travelers to pack accordingly for both warm days and chilly nights.

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 13°C (55°F), with highs reaching up to 33°C (92°F) and lows dropping to around -3°C (26°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 105 mm (4.1 in) over the course of 11 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 105 mm (4.1 inches) of precipitation spread over approximately 11 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 84%. With average temperature 13°C (55°F), this humidity feels like a heavy blanket wrapping around you, making every step feel sluggish and draining 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 84%, 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	1°C (35°F)	59 mm (2.3 inches)	86%	moderate
February Weather	4°C (40°F)	90 mm (3.6 inches)	86%	moderate
March Weather	7°C (45°F)	76 mm (3.0 inches)	86%	high
April Weather	13°C (55°F)	105 mm (4.1 inches)	84%	very high
May Weather	18°C (65°F)	125 mm (4.9 inches)	78%	extreme
June Weather	22°C (73°F)	121 mm (4.8 inches)	79%	very high
July Weather	25°C (78°F)	103 mm (4.1 inches)	70%	very high
August Weather	24°C (75°F)	132 mm (5.2 inches)	59%	very high
September Weather	21°C (69°F)	108 mm (4.3 inches)	68%	very high
October Weather	15°C (60°F)	103 mm (4.1 inches)	80%	high
November Weather	7°C (45°F)	83 mm (3.3 inches)	86%	moderate
December Weather	4°C (39°F)	85 mm (3.4 inches)	85%	moderate