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September Weather in Clyde Hill, United States

Last updated: June 24, 2025

In Clyde Hill, United States, the average temperature in September hovers around 16°C (61°F), making it a comfortable time to visit. Expect a minimum chill of 8°C (47°F) and a pleasant maximum of 29°C (85°F). Throughout the month, anticipate approximately 99 mm (3.9 in) of precipitation spread across about 12 days, contributing to an average humidity level of 62%.

September Temperature in Clyde Hill

In September in Clyde Hill, the average temperature is 16°C (61°F). Maximums can reach 29°C (85°F) and minimums can be as low as 8°C (47°F). This mild climate makes it an ideal destination for outdoor activities and sightseeing.

September Weather in Clyde Hill: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Clyde Hill, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Clyde Hill, September typically has an average temperature of 16°C (61°F), with highs reaching up to 29°C (85°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec424145505661656661524742
Data source: Temperature data for Clyde Hill 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 Clyde Hill

In Clyde Hill in September, the total precipitation amount is 99 mm (3.9 in) recorded over a span of 12 days.

September Precipitation Trends in Clyde Hill

The chart displays monthly precipitation patterns in Clyde Hill, 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 Clyde Hill, September typically receives around 99 mm (3.9 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec1781771281177773272499163188199
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Clyde Hill

In Clyde Hill in September, humidity is 62%. With an average temperature of 16°C (61°F), this humidity feels like a gentle blanket, making traveling comfortable yet occasionally sticky, prompting the need for light, breathable clothing to fully enjoy the sights.

September Average Humidity in Clyde Hill

This chart illustrates the average monthly humidity levels in Clyde Hill, 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 Clyde Hill is approximately 62%, 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 September generated using information from the Copernicus Climate Change Service.

September UV Index in Clyde Hill

In Clyde Hill 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 Clyde Hill.

Maximum UV Index Levels in Clyde Hill for September

The chart shows the monthly maximum UV Index (UVI) for Clyde Hill 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 Clyde Hill typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689987521
Data source: Clyde Hill 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 Clyde Hill Compares to Other Months

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

This table compares monthly weather conditions in Clyde Hill, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)178 mm (7.0 inches)86%low
February Weather5°C (41°F)177 mm (7.0 inches)86%moderate
March Weather7°C (45°F)128 mm (5.0 inches)87%moderate
April Weather10°C (50°F)117 mm (4.6 inches)84%high
May Weather13°C (56°F)77 mm (3.0 inches)81%very high
June Weather16°C (61°F)73 mm (2.9 inches)82%very high
July Weather18°C (65°F)27 mm (1.1 inches)79%very high
August Weather19°C (66°F)24 mm (0.9 inches)63%very high
September Weather16°C (61°F)99 mm (3.9 inches)62%high
October Weather11°C (52°F)163 mm (6.4 inches)83%moderate
November Weather8°C (47°F)188 mm (7.4 inches)89%low
December Weather6°C (42°F)199 mm (7.8 inches)88%low

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