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September Weather in Chatsworth, United States

Last updated: June 24, 2025

In September, the average temperature in Chatsworth, United States is a pleasant 23°C (73°F). However, temperatures can vary, dipping as low as 9°C (49°F) and soaring up to 35°C (95°F). Prepare for some wet days, as the region experiences approximately 106 mm (4.2 in) of precipitation over around 10 days. With an average humidity of 76%, the climate is sure to keep you feeling refreshed.

September Temperature in Chatsworth

In September in Chatsworth, the average temperature is 23°C (73°F), with maximums reaching 35°C (95°F) and minimums dropping as low as 9°C (49°F). This diverse weather makes it a perfect time for travelers to pack a variety of clothing for both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Chatsworth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chatsworth, September typically has an average temperature of 23°C (73°F), with highs reaching up to 35°C (95°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec434854606975787773645046
Data source: Temperature data for Chatsworth 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 Chatsworth

In Chatsworth in September, the precipitation amount is 106 mm (4.2 in) over a span of 10 days.

September Precipitation Trends in Chatsworth

The chart displays monthly precipitation patterns in Chatsworth, 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 Chatsworth, September typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec11920517215311413012615210613592155
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Chatsworth

In Chatsworth in September humidity is 76%. With an average temperature of 23°C (73°F), this humidity feels like a warm, enveloping blanket, making outdoor activities feel more intense and prompting travelers to seek shade or cool breaks more frequently.

September Average Humidity in Chatsworth

This chart illustrates the average monthly humidity levels in Chatsworth, 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 Chatsworth is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%82%85%85%83%76%76%80%88%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Chatsworth

In Chatsworth 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 Chatsworth.

Maximum UV Index Levels in Chatsworth for September

The chart shows the monthly maximum UV Index (UVI) for Chatsworth 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 Chatsworth typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109764
Data source: Chatsworth 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 Chatsworth Compares to Other Months

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

This table compares monthly weather conditions in Chatsworth, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)119 mm (4.7 inches)86%moderate
February Weather9°C (48°F)205 mm (8.1 inches)86%high
March Weather12°C (54°F)172 mm (6.8 inches)86%very high
April Weather16°C (61°F)153 mm (6.0 inches)82%very high
May Weather21°C (70°F)114 mm (4.5 inches)85%extreme
June Weather24°C (75°F)130 mm (5.1 inches)85%extreme
July Weather26°C (78°F)126 mm (4.9 inches)83%extreme
August Weather25°C (77°F)152 mm (6.0 inches)76%very high
September Weather23°C (73°F)106 mm (4.2 inches)76%very high
October Weather18°C (64°F)135 mm (5.3 inches)80%high
November Weather10°C (50°F)92 mm (3.6 inches)88%high
December Weather8°C (46°F)155 mm (6.1 inches)88%moderate

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