May Weather in Sinnamary, French Guiana

Last updated: August 23, 2025

In May, the average temperature in Sinnamary, French Guiana hovers around 26°C (80°F), with a comfortable range between a minimum of 24°C (76°F) and a maximum of 29°C (84°F). Expect a fair amount of rain, with 475 mm (18.7 in) of precipitation over the course of 30 days. The climate is further characterized by an average humidity level of 68%, creating a warm and slightly humid atmosphere.

May Temperature in Sinnamary

In May in Sinnamary, the average temperature is 26°C (80°F). The maximum can reach 29°C (84°F), and the minimum can be as low as 24°C (76°F). This makes it an ideal time for travelers who enjoy warm and pleasant weather.

May Weather in Sinnamary: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Sinnamary, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sinnamary, May typically has an average temperature of 26°C (80°F), with highs reaching up to 29°C (84°F) and lows dropping to around 24°C (76°F).

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

May Precipitation in Sinnamary

In Sinnamary in May, the total precipitation amount is 475 mm (18.7 in) over a period of 30 days.

May Precipitation Trends in Sinnamary

The chart displays monthly precipitation patterns in Sinnamary, 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 Sinnamary, May typically receives around 475 mm (18.7 inches) of precipitation spread over approximately 30 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

May Humidity in Sinnamary

In Sinnamary in May, humidity is 68%. With an average temperature of 26°C (80°F), this humidity feels like quite a muggy embrace, making outdoor activities feel more strenuous and the air thicker, which can be a bit uncomfortable for traveling.

May Average Humidity in Sinnamary

This chart illustrates the average monthly humidity levels in Sinnamary, 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 Sinnamary is approximately 68%, offering insight into how humid the weather typically is during this month.

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

May UV Index in Sinnamary

In Sinnamary 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 Sinnamary, you can check here.

Maximum UV Index Levels in Sinnamary for May

The chart shows the monthly maximum UV Index (UVI) for Sinnamary 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 Sinnamary typically reaches 14, which falls under the extreme exposure category.

Data source: Sinnamary 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 Sinnamary Compares to Other Months

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

This table compares monthly weather conditions in Sinnamary, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (79°F)	169 mm (6.7 inches)	70%	extreme
February Weather	26°C (79°F)	135 mm (5.3 inches)	66%	extreme
March Weather	26°C (79°F)	153 mm (6.0 inches)	66%	extreme
April Weather	26°C (80°F)	334 mm (13.2 inches)	66%	extreme
May Weather	26°C (80°F)	475 mm (18.7 inches)	68%	extreme
June Weather	26°C (80°F)	423 mm (16.6 inches)	86%	extreme
July Weather	26°C (80°F)	242 mm (9.5 inches)	76%	extreme
August Weather	27°C (81°F)	103 mm (4.1 inches)	65%	extreme
September Weather	27°C (82°F)	68 mm (2.7 inches)	62%	extreme
October Weather	27°C (82°F)	70 mm (2.8 inches)	63%	extreme
November Weather	27°C (81°F)	202 mm (8.0 inches)	74%	extreme
December Weather	26°C (79°F)	294 mm (11.6 inches)	79%	extreme