September Weather in Anacortes, United States

Last updated: June 24, 2025

In September, the average temperature in Anacortes, United States hovers around 15°C (60°F). Expect a range where the minimum can dip to 8°C (47°F) and the maximum can reach up to 26°C (78°F). During this time, you might experience 112 mm (4.4 in) of precipitation spread across 11 days, with an average humidity of 76%. Prepare accordingly for a blend of mild temperatures and occasional rain!

September Temperature in Anacortes

In September in Anacortes, the average temperature is 15°C (60°F). Maximum temperatures can reach 26°C (78°F), while minimums can dip as low as 8°C (47°F). This pleasant climate makes it an ideal time for travelers to explore and enjoy outdoor activities.

September Weather in Anacortes: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Anacortes, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Anacortes, September typically has an average temperature of 15°C (60°F), with highs reaching up to 26°C (78°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec413944485459626459514641
Data source: Temperature data for Anacortes 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.

September Precipitation in Anacortes

In Anacortes in September, the precipitation amount is 112 mm (4.4 in) that occurs over the course of 11 days.

September Precipitation Trends in Anacortes

The chart displays monthly precipitation patterns in Anacortes, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Anacortes, September typically receives around 112 mm (4.4 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec17117513810261522118112166226199
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Anacortes

In Anacortes in September humidity is 76%. With an average temperature of 15°C (60°F), this humidity feels like a warm, damp blanket wrapping around you, making outdoor activities a bit more challenging and urging you to stay hydrated while exploring the area.

September Average Humidity in Anacortes

This chart illustrates the average monthly humidity levels in Anacortes, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Anacortes is approximately 76%, 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 September generated using information from the Copernicus Climate Change Service.

September UV Index in Anacortes

In Anacortes in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Anacortes.

Maximum UV Index Levels in Anacortes for September

The chart shows the monthly maximum UV Index (UVI) for Anacortes in September, 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 September, the maximum UV index in Anacortes typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689987522
Data source: Anacortes September 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 September Weather in Anacortes Compares to Other Months

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

This table compares monthly weather conditions in Anacortes, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)171 mm (6.7 inches)86%low
February Weather4°C (40°F)175 mm (6.9 inches)85%moderate
March Weather7°C (44°F)137 mm (5.4 inches)86%moderate
April Weather9°C (49°F)102 mm (4.0 inches)86%high
May Weather12°C (55°F)61 mm (2.4 inches)81%very high
June Weather15°C (59°F)52 mm (2.0 inches)83%very high
July Weather17°C (63°F)21 mm (0.8 inches)84%very high
August Weather18°C (64°F)18 mm (0.7 inches)77%very high
September Weather15°C (60°F)112 mm (4.4 inches)76%high
October Weather11°C (51°F)166 mm (6.5 inches)88%moderate
November Weather8°C (46°F)226 mm (8.9 inches)87%low
December Weather5°C (41°F)199 mm (7.8 inches)87%low

Compare Anacortes's Climate with Cities Worldwide