September Weather in Mercedes, Uruguay

Last updated: August 28, 2025

In Mercedes, Uruguay, the average temperature in September hovers around 15°C (60°F), with a minimum drop to 2°C (35°F) and a maximum climb to 31°C (88°F). Expect 98 mm (3.9 in) of precipitation spread over about 7 days, and enjoy a comfortable average humidity of 70%.

September Temperature in Mercedes

In September in Mercedes, the average temperature is 15°C (60°F), with maximums reaching 31°C (88°F) and minimums dropping to as low as 2°C (35°F). It's advisable to pack layers to comfortably enjoy your travels in varied temperatures.

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

The chart illustrates September temperature patterns in Mercedes, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mercedes, September typically has an average temperature of 15°C (60°F), with highs reaching up to 31°C (88°F) and lows dropping to around 2°C (35°F).

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

September Precipitation in Mercedes

In Mercedes in September, the precipitation amount is 98 mm (3.9 in) over a span of 7 days.

September Precipitation Trends in Mercedes

The chart displays monthly precipitation patterns in Mercedes, 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 Mercedes, September typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 7 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 Mercedes

In Mercedes in September humidity is 70%. With an average temperature of 15°C (60°F), this humidity feels like a warm, sticky embrace that can quickly lead to discomfort while traveling, making it important to stay hydrated and take breaks in the shade.

September Average Humidity in Mercedes

This chart illustrates the average monthly humidity levels in Mercedes, 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 Mercedes is approximately 70%, 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 Mercedes

In Mercedes 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 Mercedes.

Maximum UV Index Levels in Mercedes for September

The chart shows the monthly maximum UV Index (UVI) for Mercedes 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 Mercedes typically reaches 8, which falls under the very high exposure category.

Data source: Mercedes 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 Mercedes Compares to Other Months

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

This table compares monthly weather conditions in Mercedes, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	25°C (77°F)	110 mm (4.3 inches)	54%	extreme
February Weather	24°C (75°F)	107 mm (4.2 inches)	61%	extreme
March Weather	21°C (71°F)	103 mm (4.1 inches)	69%	extreme
April Weather	19°C (66°F)	95 mm (3.7 inches)	79%	very high
May Weather	15°C (58°F)	92 mm (3.6 inches)	85%	moderate
June Weather	12°C (54°F)	71 mm (2.8 inches)	82%	moderate
July Weather	11°C (52°F)	68 mm (2.7 inches)	69%	moderate
August Weather	13°C (55°F)	87 mm (3.4 inches)	65%	high
September Weather	15°C (60°F)	98 mm (3.9 inches)	70%	very high
October Weather	17°C (64°F)	97 mm (3.8 inches)	63%	extreme
November Weather	21°C (71°F)	61 mm (2.4 inches)	60%	extreme
December Weather	23°C (74°F)	96 mm (3.8 inches)	63%	extreme