September Weather in Florencia, Costa Rica

Last updated: August 23, 2025

In September, the average temperature in Florencia, Costa Rica hovers around 21°C (70°F). Expect minimums as low as 16°C (62°F) and maximums reaching 28°C (83°F). However, be prepared for rain, as the area sees approximately 288 mm (11.3 in) of precipitation spread over 29 days, contributing to an average humidity of 84%.

September Temperature in Florencia

In September in Florencia, the average temperature is 21°C (70°F), with maximums reaching 28°C (83°F) and minimums dipping to 16°C (62°F). This pleasant climate makes it an ideal time for travelers to explore and enjoy outdoor activities.

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

The chart illustrates September temperature patterns in Florencia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Florencia, September typically has an average temperature of 21°C (70°F), with highs reaching up to 28°C (83°F) and lows dropping to around 16°C (62°F).

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

September Precipitation in Florencia

In Florencia in September, the precipitation amount is 288 mm (11.3 in) over a duration of 29 days.

September Precipitation Trends in Florencia

The chart displays monthly precipitation patterns in Florencia, 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 Florencia, September typically receives around 288 mm (11.3 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 Florencia

In Florencia in September, humidity is 84%. With an average temperature of 21°C (70°F), this humidity feels like thick, warm air wrapping around you, making outdoor activities quite uncomfortable and necessitating frequent hydration breaks for a more enjoyable travel experience.

September Average Humidity in Florencia

This chart illustrates the average monthly humidity levels in Florencia, 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 Florencia is approximately 84%, 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 Florencia

In Florencia 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 Florencia.

Maximum UV Index Levels in Florencia for September

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

Data source: Florencia 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 Florencia Compares to Other Months

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

This table compares monthly weather conditions in Florencia, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	19°C (67°F)	67 mm (2.7 inches)	71%	extreme
February Weather	20°C (68°F)	28 mm (1.1 inches)	70%	extreme
March Weather	20°C (69°F)	38 mm (1.5 inches)	68%	extreme
April Weather	21°C (71°F)	92 mm (3.6 inches)	69%	extreme
May Weather	21°C (71°F)	306 mm (12.0 inches)	70%	extreme
June Weather	21°C (71°F)	268 mm (10.6 inches)	81%	extreme
July Weather	21°C (70°F)	241 mm (9.5 inches)	88%	extreme
August Weather	21°C (70°F)	273 mm (10.8 inches)	85%	extreme
September Weather	21°C (70°F)	288 mm (11.3 inches)	84%	extreme
October Weather	21°C (69°F)	434 mm (17.1 inches)	82%	extreme
November Weather	20°C (69°F)	228 mm (9.0 inches)	81%	extreme
December Weather	20°C (68°F)	121 mm (4.7 inches)	74%	very high