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September Weather in King City, United States

Last updated: June 24, 2025

In September, the average temperature in King City, United States is a comfortable 21°C (71°F), with the mercury swinging from a chilly 6°C (43°F) at its lowest to a sizzling 34°C (94°F) at its peak. Visitors should also prepare for about 106 mm (4.2 in) of precipitation spread over 9 days, and expect average humidity levels around 72%, creating a warm yet refreshing atmosphere.

September Temperature in King City

In September in King City, the average temperature is 21°C (71°F), with maximums reaching 34°C (94°F) and minimums dropping as low as 6°C (43°F). This diverse temperature range makes it a great destination for travelers seeking both warm days and cooler evenings.

September Weather in King City: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in King City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In King City, September typically has an average temperature of 21°C (71°F), with highs reaching up to 34°C (94°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec283044526576797671554235
Data source: Temperature data for King City 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 King City

In King City in September, the total precipitation amount is 106 mm (4.2 in), spread over the course of 9 days.

September Precipitation Trends in King City

The chart displays monthly precipitation patterns in King City, 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 King City, September typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec46369484170140118961061394839
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in King City

In King City in September, humidity is 72%. With an average temperature of 21°C (71°F), this humidity feels like a warm embrace, creating a thick, sultry atmosphere that can be quite heavy for traveling.

September Average Humidity in King City

This chart illustrates the average monthly humidity levels in King City, 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 King City is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%78%75%77%82%83%81%78%72%72%84%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in King City

In King City in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in King City.

Maximum UV Index Levels in King City for September

The chart shows the monthly maximum UV Index (UVI) for King City 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 King City typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
Data source: King City 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 King City Compares to Other Months

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

This table compares monthly weather conditions in King City, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)46 mm (1.8 inches)80%moderate
February Weather-1°C (30°F)36 mm (1.4 inches)78%moderate
March Weather7°C (44°F)94 mm (3.7 inches)75%high
April Weather11°C (53°F)84 mm (3.3 inches)77%very high
May Weather18°C (65°F)170 mm (6.7 inches)82%very high
June Weather25°C (77°F)140 mm (5.5 inches)83%extreme
July Weather26°C (79°F)118 mm (4.7 inches)81%extreme
August Weather24°C (76°F)96 mm (3.8 inches)78%very high
September Weather21°C (71°F)106 mm (4.2 inches)72%very high
October Weather13°C (55°F)138 mm (5.5 inches)72%high
November Weather5°C (42°F)48 mm (1.9 inches)84%moderate
December Weather2°C (35°F)39 mm (1.5 inches)86%moderate

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