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September Weather in La Cruz, Costa Rica

Last updated: August 23, 2025

In September, the average temperature in La Cruz, Costa Rica hovers around 26°C (80°F), offering a pleasant climate. Temperatures can dip to a minimum of 24°C (75°F) and peak at a warm 30°C (87°F). However, be prepared for some rain, with an average precipitation of 219 mm (8.6 in) spread over 25 days. The humidity levels are notably high, averaging around 80%, adding to the tropical feel of the region.

September Temperature in La Cruz

In September in La Cruz, the average temperature is 26°C (80°F). Maximums can reach 30°C (87°F), and minimums can be as low as 24°C (75°F). This pleasant weather makes La Cruz an ideal destination for travelers seeking warmth and comfort.

September Weather in La Cruz: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in La Cruz, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In La Cruz, September typically has an average temperature of 26°C (80°F), with highs reaching up to 30°C (87°F) and lows dropping to around 24°C (75°F).
JanFebMarAprMayJunJulAugSepOctNovDec777878818180808080797978
Data source: Temperature data for La Cruz 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 La Cruz

In La Cruz, in September, the total precipitation amount is 219 mm (8.6 in), recorded over a span of 25 days.

September Precipitation Trends in La Cruz

The chart displays monthly precipitation patterns in La Cruz, 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 La Cruz, September typically receives around 219 mm (8.6 inches) of precipitation spread over approximately 25 days.
JanFebMarAprMayJunJulAugSepOctNovDec832162442046716021935614221
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in La Cruz

In La Cruz in September humidity is 80%. With an average temperature of 26°C (80°F), this humidity feels like a warm, enveloping blanket, making it quite uncomfortable for traveling. The thick, heavy air can leave you feeling sticky and fatigued, making outdoor activities more challenging and necessitating frequent breaks for hydration and cooling down.

September Average Humidity in La Cruz

This chart illustrates the average monthly humidity levels in La Cruz, 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 La Cruz 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 La Cruz

In La Cruz 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 La Cruz.

Maximum UV Index Levels in La Cruz for September

The chart shows the monthly maximum UV Index (UVI) for La Cruz 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 La Cruz typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec111314151414141313131110
Data source: La Cruz 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 La Cruz Compares to Other Months

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

This table compares monthly weather conditions in La Cruz, 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 (78°F)3 mm (0.1 inches)64%extreme
March Weather26°C (79°F)2 mm (0.1 inches)63%extreme
April Weather27°C (81°F)16 mm (0.6 inches)63%extreme
May Weather27°C (81°F)244 mm (9.6 inches)63%extreme
June Weather27°C (80°F)204 mm (8.0 inches)74%extreme
July Weather27°C (80°F)67 mm (2.6 inches)85%extreme
August Weather27°C (80°F)160 mm (6.3 inches)82%extreme
September Weather26°C (80°F)219 mm (8.6 inches)80%extreme
October Weather26°C (79°F)356 mm (14.0 inches)79%extreme
November Weather26°C (79°F)142 mm (5.6 inches)79%extreme
December Weather25°C (78°F)21 mm (0.8 inches)70%very high

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