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May Weather in Grand-Santi, French Guiana

Last updated: August 23, 2025

In Grand-Santi, French Guiana, the average temperature in May hovers around 25°C (78°F), with minimums dipping to 22°C (72°F) and maximums reaching 33°C (91°F). Expect a fair amount of rain, as precipitation totals 461 mm (18.2 in) spread over 29 days. The climate is notably humid, boasting an average humidity of 68%. Get ready for a warm and wet month!

May Temperature in Grand-Santi

In May in Grand-Santi, the average temperature is 25°C (78°F). Maximums can reach 33°C (91°F), while minimums can drop to as low as 22°C (72°F). This pleasant climate makes it an ideal destination for travelers seeking warmth and comfort.

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

The chart illustrates May 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, May typically has an average temperature of 25°C (78°F), with highs reaching up to 33°C (91°F) and lows dropping to around 22°C (72°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.

May Precipitation in Grand-Santi

In Grand-Santi in May, the total precipitation amount is 461 mm (18.2 in) spread over 29 days.

May Precipitation Trends in Grand-Santi

The chart displays monthly precipitation patterns in Grand-Santi, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Grand-Santi, May typically receives around 461 mm (18.2 inches) of precipitation spread over approximately 29 days.
JanFebMarAprMayJunJulAugSepOctNovDec1381051292904613172481157638108213
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Grand-Santi

In Grand-Santi in May, humidity is 68%. With an average temperature of 25°C (78°F), this humidity feels like a warm blanket enveloping you, making outdoor activities feel a bit more intense and sticky, but still manageable for traveling if you stay hydrated and take breaks in the shade.

May Average Humidity in Grand-Santi

This chart illustrates the average monthly humidity levels in Grand-Santi, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Grand-Santi is approximately 68%, 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 May generated using information from the Copernicus Climate Change Service.

May UV Index in Grand-Santi

In Grand-Santi in May, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Grand-Santi, you can check here.

Maximum UV Index Levels in Grand-Santi for May

The chart shows the monthly maximum UV Index (UVI) for Grand-Santi in May, 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 May, the maximum UV index in Grand-Santi typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec131516161412121313131312
Data source: Grand-Santi May 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 May 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 May’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 May’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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