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September Weather in San Diego Country Estates, United States

Last updated: June 24, 2025

In September, the average temperature in San Diego Country Estates, United States hovers around 23°C (74°F). Expect a minimum of 9°C (48°F) and a maximum soaring up to 43°C (109°F). You can also anticipate a modest precipitation of 6 mm (0.2 in) spread over 1 day, with an average humidity of 52%. Enjoy the warm, varied climate!

September Temperature in San Diego Country Estates

In September in San Diego Country Estates, the average temperature is 23°C (74°F), with maximums reaching up to 43°C (109°F) and minimums dipping as low as 9°C (48°F). This diverse temperature range makes San Diego Country Estates an ideal destination for travelers seeking both warm days and cooler evenings.

September Weather in San Diego Country Estates: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Diego Country Estates, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Diego Country Estates, September typically has an average temperature of 23°C (74°F), with highs reaching up to 43°C (109°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec525254596270767773666052
Data source: Temperature data for San Diego Country Estates 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 San Diego Country Estates

In San Diego Country Estates in September, the precipitation amount is 6 mm (0.2 in) over the course of 1 day.

September Precipitation Trends in San Diego Country Estates

The chart displays monthly precipitation patterns in San Diego Country Estates, 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 San Diego Country Estates, September typically receives around 6 mm (0.2 inches) of precipitation spread over approximately 1 days.
JanFebMarAprMayJunJulAugSepOctNovDec66907230303746153667
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Diego Country Estates

In San Diego Country Estates in September humidity is 52%. With an average temperature of 23°C (74°F), this humidity feels like a gentle embrace, making for comfortable travel as you stroll through the sights, though a slight stickiness might warrant a refreshing drink on warmer afternoons.

September Average Humidity in San Diego Country Estates

This chart illustrates the average monthly humidity levels in San Diego Country Estates, 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 San Diego Country Estates is approximately 52%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec72%77%67%56%46%48%46%42%52%58%66%74%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Diego Country Estates

In San Diego Country Estates in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in San Diego Country Estates.

Maximum UV Index Levels in San Diego Country Estates for September

The chart shows the monthly maximum UV Index (UVI) for San Diego Country Estates 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 San Diego Country Estates typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469111212121111854
Data source: San Diego Country Estates 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 San Diego Country Estates Compares to Other Months

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

This table compares monthly weather conditions in San Diego Country Estates, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (52°F)66 mm (2.6 inches)72%moderate
February Weather11°C (52°F)90 mm (3.5 inches)77%high
March Weather12°C (54°F)71 mm (2.8 inches)67%very high
April Weather15°C (60°F)30 mm (1.2 inches)56%extreme
May Weather17°C (62°F)30 mm (1.2 inches)46%extreme
June Weather21°C (70°F)3 mm (0.1 inches)48%extreme
July Weather25°C (76°F)7 mm (0.3 inches)46%extreme
August Weather25°C (77°F)4 mm (0.2 inches)42%extreme
September Weather23°C (74°F)6 mm (0.2 inches)52%extreme
October Weather19°C (67°F)15 mm (0.6 inches)58%very high
November Weather15°C (60°F)36 mm (1.4 inches)66%moderate
December Weather11°C (52°F)67 mm (2.6 inches)74%moderate

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