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September Weather in Alhambra, United States

Last updated: June 24, 2025

In September, the average temperature in Alhambra, United States is a pleasant 22°C (72°F). Visitors can expect a minimum temperature around 7°C (44°F) and a maximum that can reach up to 34°C (94°F). Throughout the month, 63 mm (2.5 in) of precipitation is likely to fall over 7 days, with the average humidity sitting at a cozy 79%.

September Temperature in Alhambra

In September in Alhambra, the average temperature is 22°C (72°F), with maximums reaching up to 34°C (94°F) and minimums dropping as low as 7°C (44°F). This comfortable climate makes Alhambra an ideal destination for travelers looking to enjoy a variety of outdoor activities.

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

The chart illustrates September temperature patterns in Alhambra, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alhambra, September typically has an average temperature of 22°C (72°F), with highs reaching up to 34°C (94°F) and lows dropping to around 7°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec313446546776797672594338
Data source: Temperature data for Alhambra 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 Alhambra

In Alhambra in September, the precipitation amount is 63 mm (2.5 in) over a span of 7 days.

September Precipitation Trends in Alhambra

The chart displays monthly precipitation patterns in Alhambra, 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 Alhambra, September typically receives around 63 mm (2.5 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec7881132142162111102119631057760
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Alhambra

In Alhambra in September humidity is 79%. With an average temperature of 22°C (72°F), this humidity feels like you are enveloped in a warm, heavy blanket, making it feel considerably hotter and adding a layer of stickiness to your skin as you navigate through the streets.

September Average Humidity in Alhambra

This chart illustrates the average monthly humidity levels in Alhambra, 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 Alhambra is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%84%83%80%83%82%83%79%79%88%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Alhambra

In Alhambra 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 Alhambra.

Maximum UV Index Levels in Alhambra for September

The chart shows the monthly maximum UV Index (UVI) for Alhambra 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 Alhambra typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111199643
Data source: Alhambra 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 Alhambra Compares to Other Months

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

This table compares monthly weather conditions in Alhambra, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)78 mm (3.1 inches)84%moderate
February Weather1°C (35°F)81 mm (3.2 inches)82%moderate
March Weather8°C (46°F)132 mm (5.2 inches)84%high
April Weather12°C (55°F)142 mm (5.6 inches)83%very high
May Weather19°C (67°F)162 mm (6.4 inches)80%very high
June Weather25°C (77°F)111 mm (4.4 inches)83%extreme
July Weather26°C (79°F)102 mm (4.0 inches)82%extreme
August Weather24°C (76°F)119 mm (4.7 inches)82%very high
September Weather22°C (72°F)63 mm (2.5 inches)79%very high
October Weather15°C (59°F)105 mm (4.1 inches)79%high
November Weather6°C (44°F)77 mm (3.0 inches)88%moderate
December Weather3°C (38°F)60 mm (2.4 inches)87%moderate

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