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April Weather in Washington, United States

Last updated: June 24, 2025

In April, the average temperature in Washington, United States is a mild 15°C (59°F). However, expect a range that can dip to a chilly -3°C (28°F) or rise to a warm 31°C (88°F). During this month, precipitation is relatively low, totaling just 12 mm (0.5 in) over 2 days, with an average humidity of 62%. Perfect weather for enjoying the local scenery!

April Temperature in Washington

In April in Washington, the average temperature is 15°C (59°F). Maximums can reach 31°C (88°F), while minimums can drop as low as -3°C (28°F). Be prepared for a wide range of temperatures when traveling to Washington during this time.

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 15°C (59°F), with highs reaching up to 31°C (88°F) and lows dropping to around -3°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec384149596780858375584839
Data source: Temperature data for Washington generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Washington

In Washington in April, the precipitation amount is 12 mm (0.5 in) over the course of 2 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 12 mm (0.5 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec484248121619105132935
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Washington

In Washington in April humidity is 62%. With an average temperature of 15°C (59°F), this humidity feels like a refreshing embrace, making it ideal for leisurely strolls and explorations without feeling overly hot or sticky.

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 62%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%82%72%62%45%34%30%31%47%62%77%80%
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.
JanFebMarAprMayJunJulAugSepOctNovDec468101112121110754
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.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)48 mm (1.9 inches)80%moderate
February Weather5°C (41°F)42 mm (1.7 inches)82%high
March Weather9°C (49°F)48 mm (1.9 inches)72%very high
April Weather15°C (59°F)12 mm (0.5 inches)62%very high
May Weather19°C (67°F)16 mm (0.6 inches)45%extreme
June Weather27°C (80°F)1 mm (0.0 inches)34%extreme
July Weather29°C (85°F)9 mm (0.3 inches)30%extreme
August Weather28°C (83°F)10 mm (0.4 inches)31%extreme
September Weather24°C (75°F)5 mm (0.2 inches)47%very high
October Weather15°C (59°F)13 mm (0.5 inches)62%high
November Weather9°C (49°F)29 mm (1.1 inches)77%moderate
December Weather4°C (39°F)35 mm (1.4 inches)80%moderate

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