nomadseason

September Weather in Apatou, French Guiana

Last updated: August 23, 2025

In September, the average temperature in Apatou, French Guiana reaches a warm 27°C (82°F). You'll experience a comfortable minimum of 21°C (70°F) and occasional highs soaring up to 37°C (99°F). Be prepared for some rain, as 96 mm (3.8 in) of precipitation can fall over approximately 14 days. Humidity levels hover around 62%, adding to the tropical feel of the season.

September Temperature in Apatou

In September in Apatou, the average temperature is 27°C (82°F). Maximum temperatures can reach 37°C (99°F), while minimums can be as low as 21°C (70°F). Travelers should be prepared for warm weather and pack accordingly to fully enjoy their visit.

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

The chart illustrates September temperature patterns in Apatou, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Apatou, September typically has an average temperature of 27°C (82°F), with highs reaching up to 37°C (99°F) and lows dropping to around 21°C (70°F).
JanFebMarAprMayJunJulAugSepOctNovDec787879797979798081828078
Data source: Temperature data for Apatou generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Apatou

In Apatou in September, the total precipitation amount is 96 mm (3.8 in) over the course of 14 days.

September Precipitation Trends in Apatou

The chart displays monthly precipitation patterns in Apatou, 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 Apatou, September typically receives around 96 mm (3.8 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec1251021062574323402561329663165223
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Apatou

In Apatou in September, humidity is 62%. With an average temperature of 27°C (82°F), this humidity feels like a warm embrace, making travel slightly sticky but invigorating, perfect for leisurely strolls along scenic paths or relaxing at outdoor cafes under the shade.

September Average Humidity in Apatou

This chart illustrates the average monthly humidity levels in Apatou, 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 Apatou is approximately 62%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec70%66%66%66%68%86%76%65%62%63%74%79%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Apatou

In Apatou 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 Apatou.

Maximum UV Index Levels in Apatou for September

The chart shows the monthly maximum UV Index (UVI) for Apatou 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 Apatou typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec131516161412121313131312
Data source: Apatou 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 Apatou Compares to Other Months

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

This table compares monthly weather conditions in Apatou, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)125 mm (4.9 inches)70%extreme
February Weather26°C (78°F)102 mm (4.0 inches)66%extreme
March Weather26°C (79°F)106 mm (4.2 inches)66%extreme
April Weather26°C (79°F)257 mm (10.1 inches)66%extreme
May Weather26°C (79°F)432 mm (17.0 inches)68%extreme
June Weather26°C (79°F)340 mm (13.4 inches)86%extreme
July Weather26°C (79°F)256 mm (10.1 inches)76%extreme
August Weather27°C (80°F)132 mm (5.2 inches)65%extreme
September Weather27°C (82°F)96 mm (3.8 inches)62%extreme
October Weather28°C (82°F)63 mm (2.5 inches)63%extreme
November Weather27°C (80°F)165 mm (6.5 inches)74%extreme
December Weather26°C (78°F)223 mm (8.8 inches)79%extreme

Compare Apatou's Climate with Cities Worldwide