September Weather in Mercedes, Argentina

Last updated: August 22, 2025

In Mercedes, Argentina, the average temperature in September hovers around 18°C (65°F), with a range that can dip as low as 5°C (41°F) and soar up to 37°C (100°F). Expect approximately 125 mm (4.9 in) of precipitation spread over 9 days, and enjoy an average humidity level of 55%.

September Temperature in Mercedes

In September in Mercedes, the average temperature is 18°C (65°F). Maximums can reach 37°C (100°F), and minimums can be as low as 5°C (41°F). This variation means travelers should be prepared for both warm days and cooler evenings.

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 18°C (65°F), with highs reaching up to 37°C (100°F) and lows dropping to around 5°C (41°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 total precipitation amount is 125 mm (4.9 in) recorded over a span of 9 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 125 mm (4.9 inches) of precipitation spread over approximately 9 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 Mercedes

In Mercedes in September humidity is 55%. With an average temperature of 18°C (65°F), this humidity feels like a gentle embrace, creating a comfortable yet slightly sticky atmosphere that is perfect for leisurely strolls and outdoor adventures.

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 55%, 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 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check 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 9, 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	26°C (80°F)	190 mm (7.5 inches)	66%	extreme
February Weather	25°C (78°F)	63 mm (2.5 inches)	61%	extreme
March Weather	23°C (75°F)	104 mm (4.1 inches)	71%	extreme
April Weather	21°C (70°F)	100 mm (3.9 inches)	81%	very high
May Weather	17°C (62°F)	131 mm (5.1 inches)	84%	high
June Weather	15°C (59°F)	68 mm (2.7 inches)	76%	moderate
July Weather	14°C (57°F)	47 mm (1.9 inches)	64%	moderate
August Weather	16°C (61°F)	70 mm (2.7 inches)	46%	high
September Weather	18°C (65°F)	125 mm (4.9 inches)	55%	very high
October Weather	21°C (70°F)	134 mm (5.3 inches)	57%	extreme
November Weather	23°C (74°F)	119 mm (4.7 inches)	59%	extreme
December Weather	25°C (77°F)	91 mm (3.6 inches)	75%	extreme