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August Weather in Snohomish, United States

Last updated: June 24, 2025

In August, the average temperature in Snohomish, United States is a pleasant 18°C (64°F). Temperatures can swing from a chilly 6°C (44°F) to a warm 34°C (93°F). Visitors should be prepared for some rain, with an average precipitation of 32 mm (1.3 in) over 5 days. Don't forget to stay comfortable in the 63% average humidity!

August Temperature in Snohomish

In August in Snohomish, the average temperature is 18°C (64°F). Maximum temperatures can reach 34°C (93°F), while minimums can drop as low as 6°C (44°F). This variety in temperatures makes Snohomish an ideal destination for travelers seeking both warm days and cooler nights.

August Weather in Snohomish: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Snohomish, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Snohomish, August typically has an average temperature of 18°C (64°F), with highs reaching up to 34°C (93°F) and lows dropping to around 6°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec403843485559646459494439
Data source: Temperature data for Snohomish 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.

August Precipitation in Snohomish

In Snohomish in August, the precipitation amount is 32 mm (1.3 in) over the course of 5 days.

August Precipitation Trends in Snohomish

The chart displays monthly precipitation patterns in Snohomish, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Snohomish, August typically receives around 32 mm (1.3 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec25527220317299903232131246302296
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Snohomish

In Snohomish in August, humidity is 63%. With an average temperature of 18°C (64°F), this humidity feels like a warm embrace, creating a sense of stickiness that may cause you to seek out shade or a refreshing drink while exploring the city’s sights.

August Average Humidity in Snohomish

This chart illustrates the average monthly humidity levels in Snohomish, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Snohomish is approximately 63%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%87%84%81%82%79%63%62%83%89%88%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Snohomish

In Snohomish in August, 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 Snohomish.

Maximum UV Index Levels in Snohomish for August

The chart shows the monthly maximum UV Index (UVI) for Snohomish in August, 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 August, the maximum UV index in Snohomish typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689987522
Data source: Snohomish August 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 August Weather in Snohomish Compares to Other Months

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

This table compares monthly weather conditions in Snohomish, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)255 mm (10.0 inches)86%low
February Weather3°C (38°F)272 mm (10.7 inches)86%moderate
March Weather6°C (44°F)203 mm (8.0 inches)87%moderate
April Weather9°C (49°F)172 mm (6.8 inches)84%high
May Weather13°C (55°F)99 mm (3.9 inches)81%very high
June Weather15°C (60°F)89 mm (3.5 inches)82%very high
July Weather18°C (64°F)32 mm (1.3 inches)79%very high
August Weather18°C (64°F)32 mm (1.3 inches)63%very high
September Weather15°C (59°F)131 mm (5.2 inches)62%high
October Weather9°C (49°F)246 mm (9.7 inches)83%moderate
November Weather7°C (44°F)302 mm (11.9 inches)89%low
December Weather4°C (39°F)295 mm (11.6 inches)88%low

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