September Weather in Sealy, United States

Last updated: June 24, 2025

In Sealy, United States, the average temperature in September soars to a warm 27°C (81°F). However, be prepared for a range—temperatures can dip to a cool 12°C (54°F) or rise to a blistering 38°C (101°F). With 129 mm (5.1 in) of precipitation spread over 14 days, humidity is notably high at 73%. Make sure to pack for both warmth and potential rain!

September Temperature in Sealy

In September, in Sealy, the average temperature is 27°C (81°F), with maximums reaching up to 38°C (101°F) and minimums dropping as low as 12°C (54°F). This makes it an ideal time for travelers seeking warm weather while also enjoying a pleasant range of temperatures for outdoor activities.

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

The chart illustrates September temperature patterns in Sealy, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sealy, September typically has an average temperature of 27°C (81°F), with highs reaching up to 38°C (101°F) and lows dropping to around 12°C (54°F).

Data source: Temperature data for Sealy generated using information from the Copernicus Climate Change Service.

September Precipitation in Sealy

In Sealy in September, the precipitation amount is 129 mm (5.1 in) over the course of 14 days.

September Precipitation Trends in Sealy

The chart displays monthly precipitation patterns in Sealy, 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 Sealy, September typically receives around 129 mm (5.1 inches) of precipitation spread over approximately 14 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Sealy

In Sealy in September, humidity is 73%. With an average temperature of 27°C (81°F), this humidity feels like a warm blanket enveloping you, making outdoor activities feel sticky and heavy, while also requiring frequent hydration breaks to stay comfortable during your travels.

September Average Humidity in Sealy

This chart illustrates the average monthly humidity levels in Sealy, 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 Sealy is approximately 73%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Sealy

In Sealy 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 Sealy.

Maximum UV Index Levels in Sealy for September

The chart shows the monthly maximum UV Index (UVI) for Sealy 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 Sealy typically reaches 11, which falls under the extreme exposure category.

Data source: Sealy 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 Sealy Compares to Other Months

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

This table compares monthly weather conditions in Sealy, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	70 mm (2.8 inches)	78%	moderate
February Weather	14°C (57°F)	83 mm (3.3 inches)	81%	very high
March Weather	19°C (66°F)	67 mm (2.6 inches)	76%	very high
April Weather	21°C (70°F)	74 mm (2.9 inches)	79%	extreme
May Weather	26°C (78°F)	159 mm (6.3 inches)	79%	extreme
June Weather	28°C (83°F)	138 mm (5.4 inches)	74%	extreme
July Weather	29°C (84°F)	105 mm (4.1 inches)	71%	extreme
August Weather	30°C (86°F)	151 mm (5.9 inches)	68%	extreme
September Weather	27°C (81°F)	129 mm (5.1 inches)	73%	extreme
October Weather	22°C (72°F)	82 mm (3.2 inches)	75%	very high
November Weather	17°C (62°F)	74 mm (2.9 inches)	78%	high
December Weather	14°C (58°F)	97 mm (3.8 inches)	84%	moderate