September Weather in Batan, Costa Rica

Last updated: August 23, 2025

In September, the average temperature in Batan, Costa Rica is a pleasant 25°C (78°F). Expect a minimum of 21°C (69°F) and a maximum of 31°C (89°F), making it an ideal time for outdoor activities. However, be prepared for 240 mm (9.4 in) of precipitation over 28 days, resulting in an average humidity of 81%. Enjoy the warmth while staying cozy and dry!

September Temperature in Batan

In September in Batan, the average temperature is 25°C (78°F). The maximum can reach 31°C (89°F) and the minimum can be as low as 21°C (69°F). This pleasant climate makes it an ideal time for outdoor activities and exploring the vibrant surroundings.

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

The chart illustrates September temperature patterns in Batan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Batan, September typically has an average temperature of 25°C (78°F), with highs reaching up to 31°C (89°F) and lows dropping to around 21°C (69°F).

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

September Precipitation in Batan

In Batan in September, the precipitation amount is 240 mm (9.4 in) distributed over a period of 28 days.

September Precipitation Trends in Batan

The chart displays monthly precipitation patterns in Batan, 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 Batan, September typically receives around 240 mm (9.4 inches) of precipitation spread over approximately 28 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 Batan

In Batan in September humidity is 81%. With an average temperature of 25°C (78°F), this humidity feels like a warm, heavy blanket enveloping you, making outdoor activities less comfortable and requiring frequent breaks to stay hydrated.

September Average Humidity in Batan

This chart illustrates the average monthly humidity levels in Batan, 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 Batan is approximately 81%, 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 Batan

In Batan 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 Batan.

Maximum UV Index Levels in Batan for September

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

Data source: Batan 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 Batan Compares to Other Months

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

This table compares monthly weather conditions in Batan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	23°C (74°F)	252 mm (9.9 inches)	68%	extreme
February Weather	23°C (74°F)	138 mm (5.4 inches)	68%	extreme
March Weather	23°C (75°F)	141 mm (5.5 inches)	66%	extreme
April Weather	25°C (77°F)	172 mm (6.8 inches)	67%	extreme
May Weather	25°C (78°F)	430 mm (16.9 inches)	69%	extreme
June Weather	25°C (78°F)	370 mm (14.6 inches)	84%	extreme
July Weather	25°C (77°F)	496 mm (19.5 inches)	85%	extreme
August Weather	25°C (78°F)	352 mm (13.9 inches)	82%	extreme
September Weather	25°C (78°F)	240 mm (9.4 inches)	81%	extreme
October Weather	25°C (77°F)	354 mm (13.9 inches)	80%	extreme
November Weather	25°C (76°F)	416 mm (16.4 inches)	80%	extreme
December Weather	24°C (75°F)	342 mm (13.5 inches)	72%	very high