March weather forecast
French Guiana

The month of March in French Guiana marks the continuing ascent towards the peak of the greater rainy season. The coastal capital city of Cayenne experiences an average rainfall of approximately 350mm (13.78"), a noticeable increase from the preceding months of January and February. This escalation in precipitation is indicative of the gradual intensification of the rainy season, which is set to peak in the coming months.

Inland regions of the country, particularly the dense rainforest areas, follow this trend of increasing precipitation. Cities like Saint-Laurent-du-Maroni reflect similar rainfall patterns to Cayenne, demonstrating a countrywide synchronization in weather patterns during this time.

Despite the increasing rainfall, the temperature in March remains largely unchanged from the previous months. Daily averages still range from a minimum of about 23°C (73.4°F) at night to a maximum of approximately 29°C (84.2°F) during the day. This consistent temperature range, even during increased rainfall, exemplifies the enduring warmth of French Guiana's tropical climate.

Sunlight in March, while still abundant, decreases slightly compared to the earlier months, with coastal areas receiving an average of about 5 hours of sunshine per day. As the rainy season escalates, the skies often fluctuate between being partly cloudy and overcast, reflecting the increased cloud cover associated with the season.

Visitors to French Guiana in March should anticipate frequent, intense bouts of rain and persistently high humidity. While the temperatures remain consistent, the enhanced rainfall and declining sunshine make March a month of noticeable change in the weather landscape of French Guiana.

---

• Cayenne - March »
  In Cayenne, French Guiana, in March, it is raining for 20.7 days, with typically 334mm (13.15") of accumulated precipitation. In Cayenne the average seawater temperature in March is 27.7°C (81.9°F).
• Kourou - March »
  During the month of March, an average temperature of 24.2°C (75.6°F) is noted during the nights in Kourou, French Guiana. Transition to March continues to see rising temperatures and a further reduction in rainfall down to 266mm (10.47") in Kourou, French Guiana.
• Remire-Montjoly - March »
  On the first day of March in Remire-Montjoly, sunrise is at 06:40 and sunset at 18:42. In Remire-Montjoly, French Guiana, the average seawater temperature in March is 27.7°C (81.9°F).
• Maripasoula - March »
  On the first day of March in Maripasoula, sunrise is at 06:46 and sunset at 18:49. In Maripasoula the average relative humidity in March is 86%.
• Mana - March »
  In Mana in March, the average water temperature is 27.1°C (80.8°F). On the first day of March in Mana, French Guiana, sunrise is at 06:46 and sunset at 18:47.
• Apatou - March »
  In Apatou, during March, the rain falls for 25.3 days and regularly aggregates up to 46mm (1.81") of precipitation. In Apatou, in March, during 25.3 rainfall days, 46mm (1.81") of precipitation is typically accumulated.
• Grand-Santi - March »
  In Grand-Santi, French Guiana, in March, during 26.5 rainfall days, 70mm (2.76") of precipitation is typically accumulated. In Grand-Santi the average relative humidity in March is 85%.
• Camopi - March »
  In Camopi in March, it is raining for 25.9 days, with typically 86mm (3.39") of accumulated precipitation. The tale of March in Camopi, French Guiana brings a reflection of February's weather, promising a consistent pattern.
• Iracoubo - March »
  In Iracoubo in March, during 27.8 rainfall days, 129mm (5.08") of precipitation is typically accumulated. During the month of March, Iracoubo's average nighttime temperature closely mirrors its daytime counterpart, at a still moderately hot 24.7°C (76.5°F).
• Saul - March »
  In Saul during March, the rain falls for 26.8 days and regularly aggregates up to 82mm (3.23") of precipitation. On the last day of March, in Saul, sunrise is at 06:32 and sunset at 18:41 -03.