January weather forecast
French Guiana

January falls within the greater rainy season in French Guiana, a period associated with increased precipitation levels across the country. Cayenne, the capital city located on the coast, receives an average rainfall of approximately 300mm (11.81") in January, with around 20 rainy days throughout the month. This level of rainfall is higher than in December and marks the gradual intensification of the rainy season which peaks in the following months.

The inland regions, particularly the rainforest areas, receive even more precipitation than the coastal areas. Saint-Laurent-du-Maroni, a city located on the western border with Suriname, experiences rainfall similar to Cayenne in quantity, but with slightly higher variability due to its inland location.

Temperature-wise, January is consistent with the rest of the year, reflecting French Guiana's tropical climate. Average daily temperatures range from a low of 23°C (73.4°F) at night to a high of 29°C (84.2°F) during the day. This makes January one of the cooler months in French Guiana, albeit still comfortably warm by most standards.

Despite the increased precipitation, sunlight is still plentiful in January, with an average of 6 hours of sunshine per day in coastal areas. However, the skies are often partly cloudy or overcast, which is a continuation from the conditions in December and sets the stage for the heavier rainfall expected in the subsequent months of February through April.

While January is not the most extreme month in terms of weather conditions in French Guiana, it does represent a transition towards the peak of the rainy season. Consequently, it's important for visitors to be prepared for regular bouts of rainfall and relatively high humidity during this month.

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• Cayenne - January »
  Following the virtue of being the initial month of the year, January in Cayenne manifests the onset of the wet season. In Cayenne during January, the rain falls for 23.6 days and regularly aggregates up to 451mm (17.76") of precipitation.
• Kourou - January »
  January, noted for its average high-temperature of 29°C (84.2°F) and an average low-temperature of 23.8°C (74.8°F), is considered the coldest month in Kourou. On the last day of January, in Kourou sunrise is at 06:46 and sunset at 18:41 -03.
• Remire-Montjoly - January »
  On the last day of January, in Remire-Montjoly, sunrise is at 06:45 and sunset at 18:39 -03. On the first day of January in Remire-Montjoly, sunrise is at 06:37 and sunset at 18:27.
• Maripasoula - January »
  In Maripasoula, French Guiana, in January, during 26.8 rainfall days, 86mm (3.39") of precipitation is typically accumulated. In Maripasoula during January, the rain falls for 26.8 days and regularly aggregates up to 86mm (3.39") of precipitation.
• Mana - January »
  In Mana during January, the rain falls for 23.6 days and regularly aggregates up to 54mm (2.13") of precipitation. In January, the average relative humidity in Mana is 82%.
• Apatou - January »
  In Apatou during January, the rain falls for 23.6 days and regularly aggregates up to 54mm (2.13") of precipitation. In Apatou, during January, the rain falls for 23.6 days and regularly aggregates up to 54mm (2.13") of precipitation.
• Grand-Santi - January »
  As Grand-Santi, French Guiana transitions from the end of the old year into January, there is a noticeable continuation of humidity levels. In Grand-Santi in January, during 28 rainfall days, 86mm (3.39") of precipitation is typically accumulated.
• Camopi - January »
  In January, the average heat index, which takes the relative humidity and factors it into the air temperature reading, is calculated to be 35°C (95°F). Kicking off the year in Camopi, French Guiana is the sultry month of January.
• Iracoubo - January »
  In Iracoubo in January, during 27.6 rainfall days, 161mm (6.34") of precipitation is typically accumulated. In Iracoubo in January, it is raining for 27.6 days, with typically 161mm (6.34") of accumulated precipitation.
• Saul - January »
  In Saul the average relative humidity in January is 87%. The average heat index, which combines relative humidity and air temperature, in January is computed to be 39°C (102.2°F).