September Weather in Bel Air, United States

Last updated: June 24, 2025

In September, the average temperature in Bel Air, United States hovers around 22°C (71°F), making it a pleasant time to visit. However, be prepared for temperature fluctuations, as it can dip to a minimum of 8°C (46°F) and peak at a warm 33°C (91°F). During this month, anticipate approximately 102 mm (4.0 in) of precipitation spread over 10 days, contributing to an average humidity of 75%. Plan your activities accordingly for a delightful experience!

September Temperature in Bel Air

In September, in Bel Air, the average temperature is 22°C (71°F), with maximums reaching 33°C (91°F) and minimums dipping as low as 8°C (46°F). This pleasant climate makes Bel Air an ideal destination for travelers looking to enjoy both warm days and cool evenings.

September Weather in Bel Air: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Bel Air, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bel Air, September typically has an average temperature of 22°C (71°F), with highs reaching up to 33°C (91°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec363945556574797771614740
Data source: Temperature data for Bel Air 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 Bel Air

In Bel Air in September, the total precipitation amount is 102 mm (4.0 in) falling over the course of 10 days.

September Precipitation Trends in Bel Air

The chart displays monthly precipitation patterns in Bel Air, 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 Bel Air, September typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec6197931011359512613010210483100
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Bel Air

In Bel Air in September, humidity is 75%. With an average temperature of 22°C (71°F), this humidity feels like a warm embrace, making traveling a bit sticky but also invigorating, as the air surrounds you with a heavy yet refreshing sensation that highlights the vibrant atmosphere of your surroundings.

September Average Humidity in Bel Air

This chart illustrates the average monthly humidity levels in Bel Air, 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 Bel Air is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%83%81%78%79%74%72%75%81%85%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bel Air

In Bel Air in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Bel Air.

Maximum UV Index Levels in Bel Air for September

The chart shows the monthly maximum UV Index (UVI) for Bel Air 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 Bel Air typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098743
Data source: Bel Air 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 Bel Air Compares to Other Months

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

This table compares monthly weather conditions in Bel Air, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)60 mm (2.4 inches)84%moderate
February Weather4°C (39°F)97 mm (3.8 inches)83%moderate
March Weather7°C (45°F)93 mm (3.7 inches)83%high
April Weather13°C (55°F)101 mm (4.0 inches)81%very high
May Weather18°C (65°F)135 mm (5.3 inches)78%very high
June Weather23°C (74°F)95 mm (3.7 inches)79%very high
July Weather26°C (80°F)126 mm (5.0 inches)74%very high
August Weather25°C (77°F)130 mm (5.1 inches)72%very high
September Weather22°C (71°F)102 mm (4.0 inches)75%very high
October Weather16°C (62°F)104 mm (4.1 inches)81%high
November Weather8°C (47°F)83 mm (3.3 inches)85%moderate
December Weather4°C (40°F)100 mm (3.9 inches)84%moderate

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