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September Weather in Lakeside, United States

Last updated: June 24, 2025

In September, the average temperature in Lakeside, United States is a mild 14°C (57°F). Visitors can expect a temperature range from a chilly -1°C (30°F) to a warm 32°C (90°F). Rainfall averages about 46 mm (1.8 in) spread over 8 days, and the average humidity hovers around 67%, making for a pleasantly temperate climate.

September Temperature in Lakeside

In September in Lakeside, the average temperature is 14°C (57°F). The maximum can reach 32°C (90°F) and the minimum can be as low as -1°C (30°F). This wide range of temperatures means travelers should be prepared for both warm days and cool evenings.

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

The chart illustrates September temperature patterns in Lakeside, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lakeside, September typically has an average temperature of 14°C (57°F), with highs reaching up to 32°C (90°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec262133405159686757433530
Data source: Temperature data for Lakeside 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 Lakeside

In Lakeside in September, the precipitation amount is 46 mm (1.8 in) over the course of 8 days.

September Precipitation Trends in Lakeside

The chart displays monthly precipitation patterns in Lakeside, 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 Lakeside, September typically receives around 46 mm (1.8 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec538354807060202646717574
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Lakeside

In Lakeside in September, humidity is 67%. With an average temperature of 14°C (57°F), this humidity feels like a cool, refreshing mist that invigorates your senses, making it quite pleasant for traveling, though a light jacket is recommended as the moisture in the air can create a brisk atmosphere.

September Average Humidity in Lakeside

This chart illustrates the average monthly humidity levels in Lakeside, 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 Lakeside is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%89%85%80%78%77%66%67%77%89%95%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lakeside

In Lakeside 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 Lakeside.

Maximum UV Index Levels in Lakeside for September

The chart shows the monthly maximum UV Index (UVI) for Lakeside 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 Lakeside typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec246789997532
Data source: Lakeside 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 Lakeside Compares to Other Months

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

This table compares monthly weather conditions in Lakeside, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)53 mm (2.1 inches)93%low
February Weather-6°C (22°F)83 mm (3.3 inches)92%moderate
March Weather1°C (33°F)54 mm (2.1 inches)89%high
April Weather4°C (40°F)80 mm (3.1 inches)85%high
May Weather11°C (51°F)70 mm (2.8 inches)80%very high
June Weather15°C (59°F)60 mm (2.3 inches)78%very high
July Weather20°C (68°F)20 mm (0.8 inches)77%very high
August Weather20°C (67°F)26 mm (1.0 inches)66%very high
September Weather14°C (57°F)46 mm (1.8 inches)67%high
October Weather6°C (43°F)71 mm (2.8 inches)77%moderate
November Weather2°C (35°F)75 mm (3.0 inches)89%moderate
December Weather-1°C (30°F)73 mm (2.9 inches)95%low

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