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September Weather in Bagaces, Costa Rica

Last updated: August 23, 2025

In September, the average temperature in Bagaces, Costa Rica is a pleasant 25°C (78°F). Expect a minimum of 21°C (70°F) and a high of 33°C (92°F). However, be prepared for a significant amount of rain, with 252 mm (9.9 in) over 26 days. The climate is notably humid, boasting an average humidity of 80%, making it a warm and wet month overall.

September Temperature in Bagaces

In September in Bagaces, the average temperature is 25°C (78°F). Maximums can reach 33°C (92°F) and minimums can drop to as low as 21°C (70°F). This pleasant climate makes Bagaces an excellent destination for travelers seeking warm weather and outdoor activities.

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

The chart illustrates September temperature patterns in Bagaces, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bagaces, September typically has an average temperature of 25°C (78°F), with highs reaching up to 33°C (92°F) and lows dropping to around 21°C (70°F).
JanFebMarAprMayJunJulAugSepOctNovDec777979818079797878777778
Data source: Temperature data for Bagaces generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Bagaces

In Bagaces in September, the total precipitation amount is 252 mm (9.9 in) recorded over a period of 26 days.

September Precipitation Trends in Bagaces

The chart displays monthly precipitation patterns in Bagaces, 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 Bagaces, September typically receives around 252 mm (9.9 inches) of precipitation spread over approximately 26 days.
JanFebMarAprMayJunJulAugSepOctNovDec8223023226510521925235512821
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bagaces

In Bagaces in September, humidity is 80%. With an average temperature of 25°C (78°F), this humidity feels like a warm blanket enveloping you, making every outdoor activity feel more strenuous and steaming, while also causing you to seek out shade and refreshment more frequently.

September Average Humidity in Bagaces

This chart illustrates the average monthly humidity levels in Bagaces, 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 Bagaces is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec66%64%63%63%63%74%85%82%80%79%79%70%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bagaces

In Bagaces 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 Bagaces.

Maximum UV Index Levels in Bagaces for September

The chart shows the monthly maximum UV Index (UVI) for Bagaces 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 Bagaces typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec111314141414141313131110
Data source: Bagaces 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 Bagaces Compares to Other Months

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

This table compares monthly weather conditions in Bagaces, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)8 mm (0.3 inches)66%extreme
February Weather26°C (79°F)2 mm (0.1 inches)64%extreme
March Weather26°C (80°F)2 mm (0.1 inches)63%extreme
April Weather27°C (82°F)30 mm (1.2 inches)63%extreme
May Weather27°C (80°F)232 mm (9.1 inches)63%extreme
June Weather26°C (79°F)265 mm (10.4 inches)74%extreme
July Weather26°C (79°F)105 mm (4.1 inches)85%extreme
August Weather26°C (79°F)219 mm (8.6 inches)82%extreme
September Weather25°C (78°F)252 mm (9.9 inches)80%extreme
October Weather25°C (77°F)355 mm (14.0 inches)79%extreme
November Weather25°C (78°F)128 mm (5.0 inches)79%extreme
December Weather25°C (78°F)20 mm (0.8 inches)70%very high

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