September Weather in Buenos Aires, Nicaragua

Last updated: August 31, 2025

In September, the average temperature in Buenos Aires, Nicaragua hovers around 27°C (81°F). Expect a minimum of 24°C (76°F) and a maximum of 30°C (87°F), making it quite warm. However, be prepared for some rain, as precipitation averages 279 mm (11.0 in) over 29 days. The air can feel quite humid, with an average humidity level of 80%.

September Temperature in Buenos Aires

In September, in Buenos Aires, the average temperature is 27°C (81°F). The maximum can reach 30°C (87°F), while the minimum can be as low as 24°C (76°F). This pleasant climate makes Buenos Aires an ideal destination for travelers seeking warm weather and outdoor activities.

September Weather in Buenos Aires: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Buenos Aires, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Buenos Aires, September typically has an average temperature of 27°C (81°F), with highs reaching up to 30°C (87°F) and lows dropping to around 24°C (76°F).

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

September Precipitation in Buenos Aires

In Buenos Aires in September, the precipitation amount is 279 mm (11.0 in) distributed over 29 days.

September Precipitation Trends in Buenos Aires

The chart displays monthly precipitation patterns in Buenos Aires, 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 Buenos Aires, September typically receives around 279 mm (11.0 inches) of precipitation spread over approximately 29 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 Buenos Aires

In Buenos Aires in September humidity is 80%. With an average temperature of 27°C (81°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making travel tiring as sweat beads form quickly and the air feels thick and heavy.

September Average Humidity in Buenos Aires

This chart illustrates the average monthly humidity levels in Buenos Aires, 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 Buenos Aires is approximately 80%, 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 Buenos Aires

In Buenos Aires in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Buenos Aires.

Maximum UV Index Levels in Buenos Aires for September

The chart shows the monthly maximum UV Index (UVI) for Buenos Aires 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 Buenos Aires typically reaches 13, which falls under the extreme exposure category.

Data source: Buenos Aires 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 Buenos Aires Compares to Other Months

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

This table compares monthly weather conditions in Buenos Aires, 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 (78°F)	21 mm (0.8 inches)	66%	extreme
February Weather	26°C (79°F)	18 mm (0.7 inches)	64%	extreme
March Weather	26°C (80°F)	19 mm (0.8 inches)	63%	extreme
April Weather	27°C (82°F)	28 mm (1.1 inches)	63%	extreme
May Weather	27°C (81°F)	277 mm (10.9 inches)	63%	extreme
June Weather	27°C (81°F)	294 mm (11.6 inches)	74%	extreme
July Weather	27°C (80°F)	188 mm (7.4 inches)	85%	extreme
August Weather	27°C (81°F)	241 mm (9.5 inches)	82%	extreme
September Weather	27°C (81°F)	279 mm (11.0 inches)	80%	extreme
October Weather	27°C (80°F)	392 mm (15.5 inches)	79%	extreme
November Weather	27°C (80°F)	163 mm (6.4 inches)	79%	extreme
December Weather	26°C (79°F)	45 mm (1.8 inches)	70%	very high