September Weather in Sweetwater, United States

Last updated: June 24, 2025

In Sweetwater, United States, the average temperature in September hovers around 25°C (77°F). However, temperatures can vary significantly, with a minimum of 7°C (44°F) and soaring up to a maximum of 38°C (101°F). Expect 60 mm (2.4 in) of precipitation spread over 7 days, while the average humidity sits at a comfortable 69%. Prepare accordingly for a diverse climate!

September Temperature in Sweetwater

In September in Sweetwater, the average temperature is 25°C (77°F). Maximums can reach 38°C (101°F) and minimums can be as low as 7°C (44°F). This climate makes Sweetwater an excellent destination for travelers who enjoy warm days and cooler nights.

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

The chart illustrates September temperature patterns in Sweetwater, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sweetwater, September typically has an average temperature of 25°C (77°F), with highs reaching up to 38°C (101°F) and lows dropping to around 7°C (44°F).

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

September Precipitation in Sweetwater

In Sweetwater in September, the precipitation amount is 60 mm (2.4 in) over the course of 7 days.

September Precipitation Trends in Sweetwater

The chart displays monthly precipitation patterns in Sweetwater, 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 Sweetwater, September typically receives around 60 mm (2.4 inches) of precipitation spread over approximately 7 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Sweetwater

In Sweetwater in September humidity is 69%. With an average temperature of 25°C (77°F), this humidity feels like a warm, heavy blanket enveloping you, making every step feel slightly sluggish and encouraging frequent breaks to enjoy refreshing beverages and cool breezes.

September Average Humidity in Sweetwater

This chart illustrates the average monthly humidity levels in Sweetwater, 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 Sweetwater is approximately 69%, 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 Sweetwater

In Sweetwater 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 Sweetwater.

Maximum UV Index Levels in Sweetwater for September

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

Data source: Sweetwater 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 Sweetwater Compares to Other Months

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

This table compares monthly weather conditions in Sweetwater, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (44°F)	24 mm (0.9 inches)	75%	moderate
February Weather	8°C (47°F)	23 mm (0.9 inches)	74%	high
March Weather	15°C (59°F)	50 mm (2.0 inches)	66%	very high
April Weather	18°C (65°F)	62 mm (2.4 inches)	70%	extreme
May Weather	23°C (74°F)	76 mm (3.0 inches)	75%	extreme
June Weather	27°C (81°F)	46 mm (1.8 inches)	79%	extreme
July Weather	29°C (84°F)	22 mm (0.9 inches)	78%	extreme
August Weather	28°C (84°F)	35 mm (1.4 inches)	71%	extreme
September Weather	25°C (77°F)	60 mm (2.4 inches)	69%	extreme
October Weather	19°C (66°F)	70 mm (2.8 inches)	70%	very high
November Weather	12°C (54°F)	25 mm (1.0 inches)	82%	high
December Weather	9°C (49°F)	23 mm (0.9 inches)	82%	moderate