July Weather in Grand-Santi, French Guiana

Last updated: August 23, 2025

In Grand-Santi, French Guiana, the average temperature in July hovers around 26°C (79°F). Expect a minimum of 21°C (70°F) and highs reaching 33°C (91°F). During this time, the region experiences a total precipitation of 248 mm (9.8 in) over 26 days, paired with an average humidity of 76%.

July Temperature in Grand-Santi

In July in Grand-Santi, the average temperature is 26°C (79°F), with maximums reaching 33°C (91°F) and minimums dropping as low as 21°C (70°F). This pleasant climate makes it an ideal destination for travelers seeking warm and comfortable weather.

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

The chart illustrates July 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, July typically has an average temperature of 26°C (79°F), with highs reaching up to 33°C (91°F) and lows dropping to around 21°C (70°F).

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

July Precipitation in Grand-Santi

In Grand-Santi in July, the precipitation amount is 248 mm (9.8 in) spread over the course of 26 days.

July Precipitation Trends in Grand-Santi

The chart displays monthly precipitation patterns in Grand-Santi, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Grand-Santi, July typically receives around 248 mm (9.8 inches) of precipitation spread over approximately 26 days.

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

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Millimeters (mm) Inches (in)

July Humidity in Grand-Santi

In Grand-Santi in July humidity is 76%. With an average temperature of 26°C (79°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities challenging and requiring frequent breaks to hydrate and cool down during your travels.

July Average Humidity in Grand-Santi

This chart illustrates the average monthly humidity levels in Grand-Santi, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Grand-Santi is approximately 76%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in Grand-Santi

In Grand-Santi in July, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Grand-Santi.

Maximum UV Index Levels in Grand-Santi for July

The chart shows the monthly maximum UV Index (UVI) for Grand-Santi in July, 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 July, the maximum UV index in Grand-Santi typically reaches 12, which falls under the extreme exposure category.

Data source: Grand-Santi July 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 July 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 July’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 July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	25°C (78°F)	137 mm (5.4 inches)	70%	extreme
February Weather	25°C (78°F)	105 mm (4.1 inches)	66%	extreme
March Weather	26°C (79°F)	129 mm (5.1 inches)	66%	extreme
April Weather	26°C (78°F)	290 mm (11.4 inches)	66%	extreme
May Weather	25°C (78°F)	461 mm (18.2 inches)	68%	extreme
June Weather	26°C (78°F)	317 mm (12.5 inches)	86%	extreme
July Weather	26°C (79°F)	248 mm (9.8 inches)	76%	extreme
August Weather	27°C (80°F)	115 mm (4.5 inches)	65%	extreme
September Weather	28°C (82°F)	76 mm (3.0 inches)	62%	extreme
October Weather	28°C (83°F)	38 mm (1.5 inches)	63%	extreme
November Weather	27°C (81°F)	108 mm (4.3 inches)	74%	extreme
December Weather	26°C (78°F)	213 mm (8.4 inches)	79%	extreme