September Weather in Sour Lake, United States

Last updated: June 24, 2025

In Sour Lake, United States, the average temperature in September hovers around 26°C (79°F). Expect a range where the minimum can dip to 13°C (55°F) and the maximum can soar to 37°C (98°F). With an average precipitation of 216 mm (8.5 in) spread over 15 days, you may want to prepare for some rain. Additionally, the average humidity stands at 72%, adding a touch of tropical warmth to your experience.

September Temperature in Sour Lake

In September in Sour Lake, the average temperature is 26°C (79°F). The maximum can reach 37°C (98°F), while the minimum can drop to as low as 13°C (55°F). This range of temperatures makes Sour Lake a great destination for travelers seeking warm weather with pleasant nighttime cooling.

September Weather in Sour Lake: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Sour Lake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sour Lake, September typically has an average temperature of 26°C (79°F), with highs reaching up to 37°C (98°F) and lows dropping to around 13°C (55°F).

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

September Precipitation in Sour Lake

In Sour Lake in September, the total amount of precipitation is 216 mm (8.5 in) spread over 15 days.

September Precipitation Trends in Sour Lake

The chart displays monthly precipitation patterns in Sour Lake, 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 Sour Lake, September typically receives around 216 mm (8.5 inches) of precipitation spread over approximately 15 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 Sour Lake

In Sour Lake in September, humidity is 72%. With an average temperature of 26°C (79°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities feel a bit more strenuous but also adding a tropical charm to your travels.

September Average Humidity in Sour Lake

This chart illustrates the average monthly humidity levels in Sour Lake, 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 Sour Lake is approximately 72%, 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 Sour Lake

In Sour Lake 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 Sour Lake.

Maximum UV Index Levels in Sour Lake for September

The chart shows the monthly maximum UV Index (UVI) for Sour Lake 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 Sour Lake typically reaches 10, which falls under the very high exposure category.

Data source: Sour Lake 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 Sour Lake Compares to Other Months

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

This table compares monthly weather conditions in Sour Lake, 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)	103 mm (4.1 inches)	81%	moderate
February Weather	14°C (57°F)	97 mm (3.8 inches)	81%	very high
March Weather	18°C (65°F)	94 mm (3.7 inches)	79%	very high
April Weather	20°C (69°F)	117 mm (4.6 inches)	80%	very high
May Weather	24°C (76°F)	198 mm (7.8 inches)	81%	extreme
June Weather	27°C (81°F)	179 mm (7.0 inches)	76%	extreme
July Weather	28°C (83°F)	144 mm (5.7 inches)	73%	extreme
August Weather	28°C (83°F)	239 mm (9.4 inches)	71%	extreme
September Weather	26°C (79°F)	216 mm (8.5 inches)	72%	very high
October Weather	22°C (72°F)	145 mm (5.7 inches)	73%	very high
November Weather	16°C (61°F)	72 mm (2.8 inches)	83%	high
December Weather	14°C (57°F)	126 mm (5.0 inches)	88%	moderate