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April Weather in Marietta-Alderwood, United States

Last updated: June 24, 2025

In April, the average temperature in Marietta-Alderwood, United States hovers around 9°C (48°F). Expect a minimum of 2°C (35°F) and a comfortable maximum of 21°C (69°F). With 127 mm (5.0 in) of precipitation spread across approximately 15 days, humidity levels remain notably high at 86%.

April Temperature in Marietta-Alderwood

In April in Marietta-Alderwood, the average temperature is 9°C (48°F). Maximums can reach 21°C (69°F), while minimums can be as low as 2°C (35°F). Be sure to pack layers to comfortably enjoy your travels in Marietta-Alderwood during this time.

April Weather in Marietta-Alderwood: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Marietta-Alderwood, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Marietta-Alderwood, April typically has an average temperature of 9°C (48°F), with highs reaching up to 21°C (69°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec413943485358636460514641
Data source: Temperature data for Marietta-Alderwood 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 Marietta-Alderwood

In Marietta-Alderwood in April, the total precipitation amount is 127 mm (5.0 in) distributed over 15 days.

April Precipitation Trends in Marietta-Alderwood

The chart displays monthly precipitation patterns in Marietta-Alderwood, 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 Marietta-Alderwood, April typically receives around 127 mm (5.0 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec19918515612776582720125186261227
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Marietta-Alderwood

In Marietta-Alderwood in April, humidity is 86%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that wraps around you, making outdoor activities uncomfortable and travel less enjoyable.

April Average Humidity in Marietta-Alderwood

This chart illustrates the average monthly humidity levels in Marietta-Alderwood, 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 Marietta-Alderwood is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%86%86%81%83%84%77%76%88%87%87%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Marietta-Alderwood

In Marietta-Alderwood in April, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Marietta-Alderwood, you can refer to this Hourly UV Index in Marietta-Alderwood.

Maximum UV Index Levels in Marietta-Alderwood for April

The chart shows the monthly maximum UV Index (UVI) for Marietta-Alderwood 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 Marietta-Alderwood typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986421
Data source: Marietta-Alderwood 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 Marietta-Alderwood Compares to Other Months

Weather in Marietta-Alderwood varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Marietta-Alderwood, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Marietta-Alderwood, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)199 mm (7.8 inches)86%low
February Weather4°C (39°F)185 mm (7.3 inches)85%moderate
March Weather6°C (44°F)156 mm (6.2 inches)86%moderate
April Weather9°C (48°F)127 mm (5.0 inches)86%high
May Weather12°C (53°F)76 mm (3.0 inches)81%very high
June Weather15°C (59°F)58 mm (2.3 inches)83%very high
July Weather17°C (63°F)27 mm (1.1 inches)84%very high
August Weather18°C (64°F)19 mm (0.8 inches)77%very high
September Weather15°C (60°F)125 mm (4.9 inches)76%high
October Weather11°C (51°F)186 mm (7.3 inches)88%moderate
November Weather8°C (46°F)261 mm (10.3 inches)87%low
December Weather5°C (41°F)227 mm (8.9 inches)87%low

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