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September Weather in Lake Isabella, United States

Last updated: June 24, 2025

In Lake Isabella, United States, the average temperature in September hovers around 17°C (63°F). However, be prepared for temperature fluctuations, with a minimum that can dip to -1°C (31°F) and a maximum soaring to 35°C (94°F). This month also sees 98 mm (3.9 in) of precipitation spread over 10 days, contributing to a relatively high average humidity of 79%. So, pack accordingly!

September Temperature in Lake Isabella

In September in Lake Isabella, the average temperature is 17°C (63°F). Maximum temperatures can reach 35°C (94°F), while the minimum can drop as low as -1°C (31°F). Be prepared for a wide range of temperatures if you're planning to travel during this time.

September Weather in Lake Isabella: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Lake Isabella, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lake Isabella, September typically has an average temperature of 17°C (63°F), with highs reaching up to 35°C (94°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec232434445868737063503629
Data source: Temperature data for Lake Isabella 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 Lake Isabella

In Lake Isabella in September, the total precipitation amount is 98 mm (3.9 in) recorded over a span of 10 days.

September Precipitation Trends in Lake Isabella

The chart displays monthly precipitation patterns in Lake Isabella, 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 Lake Isabella, September typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec555557921171037192981325565
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Lake Isabella

In Lake Isabella in September, humidity is 79%. With an average temperature of 17°C (63°F), this humidity feels like a warm, muggy embrace, making outdoor activities less comfortable and prompting travelers to seek shaded areas or cool refreshments more frequently.

September Average Humidity in Lake Isabella

This chart illustrates the average monthly humidity levels in Lake Isabella, 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 Lake Isabella is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%87%82%81%78%79%80%82%87%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lake Isabella

In Lake Isabella 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 Lake Isabella.

Maximum UV Index Levels in Lake Isabella for September

The chart shows the monthly maximum UV Index (UVI) for Lake Isabella 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 Lake Isabella typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24589101097532
Data source: Lake Isabella 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 Lake Isabella Compares to Other Months

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

This table compares monthly weather conditions in Lake Isabella, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (23°F)55 mm (2.2 inches)87%low
February Weather-5°C (24°F)55 mm (2.2 inches)87%moderate
March Weather1°C (34°F)57 mm (2.2 inches)86%moderate
April Weather7°C (45°F)92 mm (3.6 inches)87%very high
May Weather14°C (58°F)117 mm (4.6 inches)82%very high
June Weather20°C (68°F)103 mm (4.1 inches)81%very high
July Weather23°C (73°F)71 mm (2.8 inches)78%very high
August Weather21°C (70°F)92 mm (3.6 inches)79%very high
September Weather17°C (63°F)98 mm (3.9 inches)79%high
October Weather10°C (51°F)132 mm (5.2 inches)82%moderate
November Weather2°C (37°F)55 mm (2.2 inches)87%moderate
December Weather-2°C (30°F)65 mm (2.6 inches)86%low

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