September Weather in Sixaola, Costa Rica

Last updated: August 23, 2025

In Sixaola, Costa Rica, the average temperature in September hovers around 27°C (81°F). You can expect minimums of 23°C (74°F) and highs reaching up to 32°C (90°F). During this period, rainfall totals approximately 239 mm (9.4 in) spread over 28 days, contributing to a high average humidity of 81%. Stay prepared for a warm and wet experience!

September Temperature in Sixaola

In September in Sixaola, the average temperature is 27°C (81°F). Maximums can reach 32°C (90°F) and minimums can be as low as 23°C (74°F). This pleasant climate makes Sixaola a great destination for travelers looking to enjoy warm and comfortable weather.

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

The chart illustrates September temperature patterns in Sixaola, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sixaola, September typically has an average temperature of 27°C (81°F), with highs reaching up to 32°C (90°F) and lows dropping to around 23°C (74°F).

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

September Precipitation in Sixaola

In Sixaola in September, the total precipitation amount is 239 mm (9.4 in) distributed over 28 days.

September Precipitation Trends in Sixaola

The chart displays monthly precipitation patterns in Sixaola, 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 Sixaola, September typically receives around 239 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 Sixaola

In Sixaola in September humidity is 81%. With an average temperature of 27°C (81°F), this humidity feels like a warm, heavy blanket enveloping you, making travel quite uncomfortable as it can quickly drain your energy and require frequent hydration breaks.

September Average Humidity in Sixaola

This chart illustrates the average monthly humidity levels in Sixaola, 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 Sixaola 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 Sixaola

In Sixaola 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 Sixaola.

Maximum UV Index Levels in Sixaola for September

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

Data source: Sixaola 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 Sixaola Compares to Other Months

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

This table compares monthly weather conditions in Sixaola, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	25°C (78°F)	192 mm (7.6 inches)	68%	extreme
February Weather	25°C (78°F)	126 mm (4.9 inches)	68%	extreme
March Weather	25°C (78°F)	133 mm (5.2 inches)	66%	extreme
April Weather	26°C (80°F)	197 mm (7.7 inches)	67%	extreme
May Weather	27°C (81°F)	375 mm (14.8 inches)	69%	extreme
June Weather	27°C (81°F)	326 mm (12.8 inches)	84%	extreme
July Weather	27°C (80°F)	431 mm (17.0 inches)	85%	extreme
August Weather	27°C (81°F)	314 mm (12.4 inches)	82%	extreme
September Weather	27°C (81°F)	239 mm (9.4 inches)	81%	extreme
October Weather	27°C (80°F)	365 mm (14.4 inches)	80%	extreme
November Weather	26°C (80°F)	313 mm (12.3 inches)	80%	extreme
December Weather	26°C (78°F)	268 mm (10.6 inches)	72%	very high