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September Weather in Bellaire, United States

Last updated: June 24, 2025

In September, the average temperature in Bellaire, United States hovers around 17°C (62°F), with a minimum dipping to 4°C (39°F) and a maximum reaching 30°C (87°F). Expect 84 mm (3.3 in) of precipitation spread over approximately 12 days, and enjoy a relatively high average humidity of 79%. Plan accordingly for a month where varied weather conditions can surprise you!

September Temperature in Bellaire

In September in Bellaire, the average temperature is 17°C (62°F). Maximums can reach 30°C (87°F), and minimums can drop as low as 4°C (39°F). It's a great time to experience a pleasant climate, making it ideal for outdoor activities and exploration.

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

The chart illustrates September temperature patterns in Bellaire, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bellaire, September typically has an average temperature of 17°C (62°F), with highs reaching up to 30°C (87°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec242331405262696862503730
Data source: Temperature data for Bellaire 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 Bellaire

In Bellaire in September, the precipitation amount is 84 mm (3.3 in) over a span of 12 days.

September Precipitation Trends in Bellaire

The chart displays monthly precipitation patterns in Bellaire, 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 Bellaire, September typically receives around 84 mm (3.3 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec637265961121059589841439286
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bellaire

In Bellaire in September humidity is 79%. With an average temperature of 17°C (62°F), this humidity feels like a warm blanket wrapping around you, making strolling through the streets a bit heavier but still comfortably refreshing for travelers.

September Average Humidity in Bellaire

This chart illustrates the average monthly humidity levels in Bellaire, 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 Bellaire is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%91%87%87%82%79%76%76%79%83%86%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bellaire

In Bellaire 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 Bellaire.

Maximum UV Index Levels in Bellaire for September

The chart shows the monthly maximum UV Index (UVI) for Bellaire 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 Bellaire typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245799987532
Data source: Bellaire 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 Bellaire Compares to Other Months

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

This table compares monthly weather conditions in Bellaire, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)63 mm (2.5 inches)91%low
February Weather-5°C (24°F)72 mm (2.9 inches)91%moderate
March Weather-1°C (31°F)65 mm (2.6 inches)87%moderate
April Weather4°C (40°F)96 mm (3.8 inches)87%high
May Weather11°C (52°F)112 mm (4.4 inches)82%very high
June Weather17°C (62°F)105 mm (4.1 inches)79%very high
July Weather21°C (69°F)95 mm (3.7 inches)75%very high
August Weather20°C (69°F)89 mm (3.5 inches)76%very high
September Weather17°C (62°F)84 mm (3.3 inches)79%high
October Weather10°C (51°F)143 mm (5.6 inches)83%moderate
November Weather3°C (37°F)92 mm (3.6 inches)86%moderate
December Weather-1°C (30°F)86 mm (3.4 inches)87%low

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