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September Weather in Adelanto, United States

Last updated: June 24, 2025

In Adelanto, United States, the average temperature in September reaches a pleasant 24°C (75°F). However, be prepared for a range, as temperatures can dip to a minimum of 9°C (48°F) and soar to a scorching 41°C (106°F). With just 3 mm (0.1 in) of precipitation over 1 day, you can expect predominantly dry conditions, coupled with an average humidity of 48%.

September Temperature in Adelanto

In September, in Adelanto, the average temperature is 24°C (75°F). The maximum can reach 41°C (106°F) and the minimum can be as low as 9°C (48°F). This varied climate makes Adelanto an exciting destination for travelers, offering plenty of opportunities for both warm-weather activities and cooler excursions.

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

The chart illustrates September temperature patterns in Adelanto, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Adelanto, September typically has an average temperature of 24°C (75°F), with highs reaching up to 41°C (106°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec474852606575818175645647
Data source: Temperature data for Adelanto 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 Adelanto

In Adelanto in September, the precipitation amount is 3 mm (0.1 in) over the course of 1 day.

September Precipitation Trends in Adelanto

The chart displays monthly precipitation patterns in Adelanto, 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 Adelanto, September typically receives around 3 mm (0.1 inches) of precipitation spread over approximately 1 days.
JanFebMarAprMayJunJulAugSepOctNovDec4446511910389351653
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Adelanto

In Adelanto in September, humidity is 48%. With an average temperature of 24°C (75°F), this humidity feels like a pleasant, slightly warm embrace, making it ideal for exploring the outdoors and enjoying leisurely strolls without feeling overly sticky or uncomfortable.

September Average Humidity in Adelanto

This chart illustrates the average monthly humidity levels in Adelanto, 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 Adelanto is approximately 48%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%82%76%68%58%52%46%39%48%59%72%76%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Adelanto

In Adelanto in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Adelanto.

Maximum UV Index Levels in Adelanto for September

The chart shows the monthly maximum UV Index (UVI) for Adelanto 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 Adelanto typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469101112121110754
Data source: Adelanto 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 Adelanto Compares to Other Months

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

This table compares monthly weather conditions in Adelanto, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)44 mm (1.7 inches)78%moderate
February Weather9°C (49°F)46 mm (1.8 inches)82%high
March Weather11°C (52°F)51 mm (2.0 inches)75%very high
April Weather16°C (60°F)19 mm (0.7 inches)68%very high
May Weather18°C (65°F)10 mm (0.4 inches)57%extreme
June Weather24°C (76°F)3 mm (0.1 inches)52%extreme
July Weather27°C (82°F)8 mm (0.3 inches)46%extreme
August Weather27°C (81°F)9 mm (0.4 inches)39%extreme
September Weather24°C (75°F)3 mm (0.1 inches)48%very high
October Weather18°C (65°F)5 mm (0.2 inches)59%high
November Weather13°C (56°F)16 mm (0.6 inches)72%moderate
December Weather8°C (47°F)53 mm (2.1 inches)76%moderate

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