September Weather in Arenal, Honduras

Last updated: August 23, 2025

In September, the average temperature in Arenal, Honduras is a pleasant 24°C (76°F). You can expect minimum temperatures to dip to 17°C (63°F) and maxing out at a warm 35°C (95°F). The month also brings about 125 mm (4.9 in) of precipitation over 18 days, contributing to an average humidity of 75%. Enjoy the climate, but don't forget your umbrella!

September Temperature in Arenal

In September in Arenal, the average temperature is 24°C (76°F). The maximum can reach 35°C (95°F), and the minimum can be as low as 17°C (63°F). This climate makes Arenal a wonderful destination for travelers seeking pleasant weather and outdoor activities.

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

The chart illustrates September temperature patterns in Arenal, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arenal, September typically has an average temperature of 24°C (76°F), with highs reaching up to 35°C (95°F) and lows dropping to around 17°C (63°F).

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

September Precipitation in Arenal

In Arenal in September, the precipitation amount is 125 mm (4.9 in) spread over 18 days.

September Precipitation Trends in Arenal

The chart displays monthly precipitation patterns in Arenal, 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 Arenal, September typically receives around 125 mm (4.9 inches) of precipitation spread over approximately 18 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Arenal

In Arenal in September, humidity is 75%. With an average temperature of 24°C (76°F), this humidity feels like a warm embrace, making travel somewhat stifling but also richly invigorating, as the air seems to wrap around you, heightening the experience of the local sights and sounds.

September Average Humidity in Arenal

This chart illustrates the average monthly humidity levels in Arenal, 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 Arenal is approximately 75%, 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 Arenal

In Arenal 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 Arenal.

Maximum UV Index Levels in Arenal for September

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

Data source: Arenal 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 Arenal Compares to Other Months

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

This table compares monthly weather conditions in Arenal, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	21°C (69°F)	37 mm (1.5 inches)	78%	extreme
February Weather	22°C (71°F)	23 mm (0.9 inches)	74%	extreme
March Weather	23°C (73°F)	25 mm (1.0 inches)	67%	extreme
April Weather	25°C (77°F)	37 mm (1.4 inches)	61%	extreme
May Weather	25°C (78°F)	126 mm (5.0 inches)	59%	extreme
June Weather	25°C (77°F)	131 mm (5.2 inches)	61%	extreme
July Weather	24°C (76°F)	99 mm (3.9 inches)	68%	extreme
August Weather	24°C (76°F)	122 mm (4.8 inches)	70%	extreme
September Weather	24°C (76°F)	125 mm (4.9 inches)	75%	extreme
October Weather	23°C (74°F)	205 mm (8.1 inches)	81%	extreme
November Weather	22°C (71°F)	127 mm (5.0 inches)	82%	very high
December Weather	21°C (69°F)	49 mm (1.9 inches)	75%	very high