Climate and monthly weather forecast
Kourou, French Guiana

Kourou, a city located in French Guiana, exhibits a tropical rainforest climate, according to the Köppen climate classification, specifically noted as Af. The geographical position of Kourou contributes to the high temperatures and substantial rainfall experienced all year round.

Throughout the year, Kourou experiences high temperatures, where the average high temperature fluctuates minimally from 29°C (84.2°F) to 31.9°C (89.4°F). The lowest average temperatures also demonstrate a narrow range, shifting from 22.6°C (72.7°F) to 24.3°C (75.7°F) annually. The city does not lack in rainfall either; rain is witnessed almost every month, with September being the driest month with an average of 33mm (1.3"). By contrast, May tends to be the wettest, recording an average rainfall of 503mm (19.8").

Sunlight availability and sea temperatures also form important aspects of Kourou's climate throughout the year. Daylight hours range from 11.8 hours in December to a maximum of 12.4 hours from May to July. Sea temperatures stay within a close range, moving from 27.1°C (80.8°F) to 28.6°C (83.5°F) yearly.

One of the unique weather patterns in Kourou is the consistent humidity brought about by the persistent rainfall. Rainfall days are generally above 4.4 days a month, peaking in May with 24.9 days of rain. Another noteworthy pattern is the amount of sunshine, where the city enjoys more hours of sunshine from June to October, as these months record sunshine hours ranging from 7.1 to 8.7 hours.

Considering warmth, sunlight and lower rainfall, the most favorable time to visit Kourou for outdoor activities would be from June to October. During this period, the city experiences more sunshine hours, with up to 8.7 hours in September. Rainfall is at its lowest compared to the rest of the year, with September receiving the least precipitation of 33mm (1.3").

Despite temperature consistency, the period from April to May presents the least attractive time for visitation due to heavy rainfall. May records the highest rainfall of 503mm (19.8"), with approximately 24.9 days of rainfall. Sightseeing and outdoor activities might be hampered due to the frequency of rain during this period.

In Kourou, spring months from March to May see the high temperatures shifting from 29.4°C (84.9°F) to 29.6°C (85.3°F) and the lows between 24.2°C (75.6°F) and 24.3°C (75.7°F). These months, particularly May, experience the heaviest rainfall of the year, with May recording 503mm (19.8") of rain. Note that the sea temperature marginally increases from 27.4°C (81.3°F) to 28.1°C (82.6°F) and the daylight hours range from 12.1 hours to 12.4 hours.

The summer months from June to August bring the highest temperatures of the year to Kourou, ranging from 30.4°C (86.7°F) to 31°C (87.8°F). Correspondingly, the low temperatures hover between 22.7°C (72.9°F) to 22.8°C (73°F). Summer also begins the period of decreased rainfall and increased sunshine hours, with June and August recording 15.9 and 8.5 days of rainfall respectively.

During autumn, from September to November, day-time temperatures remain high, going from 31.7°C (89.1°F) to 31.2°C (88.2°F), while night-time temperatures fluctuate between 22.6°C (72.7°F) and 23.1°C (73.6°F). Remarkably, September receives the lowest rainfall of the year with 33mm (1.3"). It is during this season that sunlight shines the longest in Kourou, with a high of 8.7 hours in September.

Winter weather from December to February in Kourou still possesses a tropical climate's signature warmth, with high temperatures falling between 29°C (84.2°F) and 29.1°C (84.4°F) while the low temperatures range from 23.7°C (74.7°F) to 24°C (75.2°F). Rainfall begins to pick up from 124mm (4.88") in November to a substantial 358mm (14.09") by January. Despite the increased rainfall, the temperatures of the sea remain warm, ranging from 27.3°C (81.1°F) to 27.1°C (80.8°F).

Kourou, French Guiana, starts off the year with temperatures ranging from a high of 29°C (84.2°F) to a low of 23.8°C (74.8°F). January is characterized by a considerable number of rainy days, with rainfall totaling 358mm (14.09"). Weather in January »

Temperatures in February marginally rise, when compared to January, but the rainfall in Kourou, French Guiana decreases to 220mm (8.66"). This month is characterized by less rainfall and fewer rainy days than January; however, it is still the wet season. Weather in February »

Transition to March continues to see rising temperatures and a further reduction in rainfall down to 266mm (10.47") in Kourou, French Guiana. The number of daylight hours begins to increase slightly, signaling the impending end of the wet season. Weather in March »

April in Kourou, French Guiana, experiences weather similar to March but with an increase in rainfall to 391mm (15.39"). This month signals the arrival of the rainy season, with more frequent downpours expected compared to the preceding months. Weather in April »

Weather in Kourou, French Guiana becomes more intense with the highest rainfall of the year, measuring at an impressive 503mm (19.8"). May falls solidly in the middle of the region's wet season. Consequently, residents and visitors alike expect heavier rains and a higher number of rainy days. Weather in May »

After a month of heavy rains in Kourou, French Guiana, June witnesses a decrease in rainfall to 377mm (14.84"). Despite lower rainfall totals than May, June still presents significant rainfall, characteristic of the continuing rainy season. Weather in June »

July in Kourou, French Guiana, sees a substantial decrease in rainfall to 149mm (5.87"), a drastic dip from June's figures. This period marks the onset of drier conditions, with fewer rainy days anticipated compared to the previous months. Weather in July »

In the heart of the dry season, Kourou, French Guiana, records almost half the amount of July’s rainfall by a mere 88mm (3.46"). August emerges as an ideal period for a visit, with conditions being quite favorable for outdoor activities. Weather in August »

September brings even drier conditions to Kourou, French Guiana, with rainfall dropping to a low 33mm (1.3"). As the driest month of the year, September indicates the height of the dry season. The reduced rainfall allows uninterrupted beach stays, extensive exploration of the outdoors, and unhindered access to several tourist sites. Weather in September »

October experiences a slight increase in rainfall to 49mm (1.93") compared to September in Kourou, French Guiana; however, it remains much lower than during the wet season. This month represents a period of transition from the dry season to the gradually approaching wet season. Weather in October »

November brings with it a more noticeable increase in rainfall to 124mm (4.88") in Kourou, French Guiana. This month is characterized by the increasing frequency of rainy days and a clear departure from the region's dry season conditions. Weather in November »

In Kourou, French Guiana, December experiences a surge in rainfall to 281mm (11.06"), reintroducing the wet season's peak. As the final month of the year, December presents a characteristic increase in the number of rainy days but also a regular increase in sunshine hours. Weather in December »