September Weather in Rio Grande, Panama

Last updated: August 27, 2025

In September, the average temperature in Rio Grande, Panama is 23°C (74°F), with a minimum of 19°C (67°F) and a maximum of 29°C (85°F). You can expect significant rainfall, totaling 351 mm (13.8 in) over the course of 30 days. Additionally, the average humidity is quite high at 87%, making for a humid climate that you should be prepared for during your visit!

September Temperature in Rio Grande

In September in Rio Grande, the average temperature is 23°C (74°F). Maximum can reach 29°C (85°F) and minimum can be as low as 19°C (67°F). Overall, it's a pleasant time to visit Rio Grande, perfect for outdoor activities and exploring the local attractions.

September Weather in Rio Grande: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Rio Grande, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Grande, September typically has an average temperature of 23°C (74°F), with highs reaching up to 29°C (85°F) and lows dropping to around 19°C (67°F).

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

September Precipitation in Rio Grande

In Rio Grande in September, the total precipitation amount is 351 mm (13.8 in) over a period of 30 days.

September Precipitation Trends in Rio Grande

The chart displays monthly precipitation patterns in Rio Grande, 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 Rio Grande, September typically receives around 351 mm (13.8 inches) of precipitation spread over approximately 30 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 Rio Grande

In Rio Grande in September, humidity is 87%. With an average temperature of 23°C (74°F), this humidity feels like a warm, sticky embrace that can quickly wear you down while traveling, making even short walks feel exhausting and necessitating frequent breaks for hydration and cool air.

September Average Humidity in Rio Grande

This chart illustrates the average monthly humidity levels in Rio Grande, 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 Rio Grande is approximately 87%, 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 Rio Grande

In Rio Grande in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Rio Grande, you can check here.

Maximum UV Index Levels in Rio Grande for September

The chart shows the monthly maximum UV Index (UVI) for Rio Grande 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 Rio Grande typically reaches 14, which falls under the extreme exposure category.

Data source: Rio Grande 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 Rio Grande Compares to Other Months

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

This table compares monthly weather conditions in Rio Grande, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	22°C (72°F)	135 mm (5.3 inches)	72%	extreme
February Weather	22°C (72°F)	95 mm (3.7 inches)	71%	extreme
March Weather	22°C (72°F)	96 mm (3.8 inches)	69%	extreme
April Weather	23°C (74°F)	169 mm (6.6 inches)	70%	extreme
May Weather	23°C (74°F)	354 mm (14.0 inches)	73%	extreme
June Weather	23°C (74°F)	317 mm (12.5 inches)	90%	extreme
July Weather	23°C (74°F)	324 mm (12.7 inches)	88%	extreme
August Weather	23°C (74°F)	302 mm (11.9 inches)	87%	extreme
September Weather	23°C (74°F)	351 mm (13.8 inches)	87%	extreme
October Weather	23°C (74°F)	392 mm (15.4 inches)	86%	extreme
November Weather	23°C (73°F)	354 mm (14.0 inches)	86%	extreme
December Weather	22°C (73°F)	180 mm (7.1 inches)	79%	extreme