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August Weather in Grand-Santi, French Guiana

Last updated: August 23, 2025

In August, the average temperature in Grand-Santi, French Guiana hovers around 27°C (80°F). Expect a comfortable minimum of 22°C (71°F), while the maximum can reach up to 35°C (95°F). With an average humidity of 65%, you might want to stay refreshed, especially during the 18 rainy days that bring a total precipitation of 115 mm (4.5 in).

August Temperature in Grand-Santi

In August in Grand-Santi, the average temperature is 27°C (80°F). Maximums can reach 35°C (95°F), and minimums can be as low as 22°C (71°F). This makes it an ideal time for travelers seeking warm weather and pleasant conditions.

August Weather in Grand-Santi: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Grand-Santi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grand-Santi, August typically has an average temperature of 27°C (80°F), with highs reaching up to 35°C (95°F) and lows dropping to around 22°C (71°F).
JanFebMarAprMayJunJulAugSepOctNovDec777879787878788082828178
Data source: Temperature data for Grand-Santi 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.

August Precipitation in Grand-Santi

In Grand-Santi in August, the precipitation amount is 115 mm (4.5 in) occurring over 18 days.

August Precipitation Trends in Grand-Santi

The chart displays monthly precipitation patterns in Grand-Santi, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Grand-Santi, August typically receives around 115 mm (4.5 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec1381051292904613172481157638108213
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Grand-Santi

In Grand-Santi in August humidity is 65%. With an average temperature of 27°C (80°F), this humidity feels like a warm blanket wrapped around you, making outdoor exploration a bit sticky but still enjoyable. The air feels thick and slightly heavy, which can lead to quicker fatigue during sightseeing, so it’s wise to stay hydrated and take breaks in the shade.

August Average Humidity in Grand-Santi

This chart illustrates the average monthly humidity levels in Grand-Santi, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Grand-Santi is approximately 65%, 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 August generated using information from the Copernicus Climate Change Service.

August UV Index in Grand-Santi

In Grand-Santi in August, 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 Grand-Santi.

Maximum UV Index Levels in Grand-Santi for August

The chart shows the monthly maximum UV Index (UVI) for Grand-Santi in August, 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 August, the maximum UV index in Grand-Santi typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec131516161412121313131312
Data source: Grand-Santi August 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 August Weather in Grand-Santi Compares to Other Months

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

This table compares monthly weather conditions in Grand-Santi, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)137 mm (5.4 inches)70%extreme
February Weather25°C (78°F)105 mm (4.1 inches)66%extreme
March Weather26°C (79°F)129 mm (5.1 inches)66%extreme
April Weather26°C (78°F)290 mm (11.4 inches)66%extreme
May Weather25°C (78°F)461 mm (18.2 inches)68%extreme
June Weather26°C (78°F)317 mm (12.5 inches)86%extreme
July Weather26°C (79°F)248 mm (9.8 inches)76%extreme
August Weather27°C (80°F)115 mm (4.5 inches)65%extreme
September Weather28°C (82°F)76 mm (3.0 inches)62%extreme
October Weather28°C (83°F)38 mm (1.5 inches)63%extreme
November Weather27°C (81°F)108 mm (4.3 inches)74%extreme
December Weather26°C (78°F)213 mm (8.4 inches)79%extreme

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