Last updated: August 21, 2025
In January, Cayenne, French Guiana experiences a tropical climate characterized by warm temperatures and significant rainfall. The maximum temperature reaches a pleasant 29°C (84°F), while the average hovers around 26°C (79°F). Evenings cool down to a minimum of 23°C (74°F), providing a comfortable respite from the daytime heat. This month witnesses considerable precipitation, with an average of 225 mm (8.9 in) over 23 rainy days, contributing to the region's lush landscapes. Coupled with a humidity level of 78%, January in Cayenne offers a truly immersive experience into its vibrant, tropical atmosphere.
In Cayenne, French Guiana, January temperatures offer a delightful tropical ambiance, with lows averaging 23°C (74°F) and highs reaching up to 29°C (84°F). The consistent average of 26°C (79°F) hints at a season that is warm yet comfortable, setting the tone for the months ahead. As February rolls in, temperatures slightly climb while maintaining this cozy average, transitioning smoothly into the warmer conditions of March. Here, the maximum temperature peaks at 30°C (86°F). Notably, the month remains stable, with minimal fluctuations in averages, reflecting the region's tropical climate. As January closes, it becomes evident that Cayenne experiences a harmonious blend of warmth throughout the early year—an inviting landscape that gradually introduces a crescendo of heat leading into the summer months.
In Cayenne, French Guiana, January ushers in a notable precipitation amount of 225 mm (8.9 in), marking the onset of the rainy season. During this month, rain falls on an average of 23 days, contributing to a vibrant, lush landscape. As the year progresses, precipitation peaks in May, with a staggering 576 mm (22.7 in) over 30 days, showcasing the height of rainfall in this tropical climate. A marked decrease occurs in August, where just 92 mm (3.6 in) is recorded across 18 days, signaling a temporary reprieve from the deluge. Despite fluctuations throughout the year, January serves as a crucial indicator of the wet season's intensity, setting the stage for the dramatic shifts in precipitation that follow.
In Cayenne, French Guiana, January marks a time of relatively high humidity, averaging around 78%. This figure is slightly elevated compared to the following months of February and March, which both hover at 76%. As the year progresses, humidity begins to increase, peaking sharply in June at a significant 87%. The trend indicates a move towards a more humid environment as the rainy season approaches, with July and August also maintaining high levels at 81% and 80% respectively. Interestingly, the humidity levels gradually decline again in September, settling into a range of about 79% to 84% through the end of the year. Thus, while January enjoys a humid start, it is the mid-year months that truly showcase Cayenne's tropical climate.
In January, Cayenne, French Guiana, experiences an extreme UV Index of 13, indicating that sun exposure can lead to skin damage in as little as 10 minutes. This trend of high UV levels is consistent throughout the year, with only slight variations. February and March peak at 14 and 16, respectively, before maintaining a 16 rating from March to April, showcasing the unwavering intensity of the tropical sun. Even during the cooler months, the UV Index stays alarming, rarely dipping below 12. With such persistent UV exposure, it's essential to stay informed about sun safety. For more details, visit Cayenne UV Index.
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In Cayenne, French Guiana, January welcomes 245 hours of sunshine, marking the beginning of a vibrant year. As the months advance into February, this golden warmth increases to 255 hours, setting the stage for the looming peak of sunshine. From March onward, the brightness reaches new heights, culminating in the sunniest month of August with an impressive 346 hours. This abundant sunlight continues through the fall, ensuring that the vibrant energy of Cayenne remains undimmed as both September and October follow suit with 337 and 342 hours respectively. As the year draws to a close, the sunshine gently tapers but remains generous, with 300 hours in November and 282 hours in December, underscoring the consistent warmth and allure of this tropical paradise throughout the year.
In Cayenne, French Guiana, the likelihood of sunny weather in January is relatively low, with only an 18% chance of sunshine. This trend continues into February, maintaining the same modest probability. Interestingly, March sees a slight uptick, reaching 19%, before the chances begin to dwindle in the following months—April at 11% and May at a mere 9%. The pattern shifts dramatically mid-year, with June and July boasting much higher probabilities of 23% and 24%, respectively. As the year progresses into August and September, sunny days become more frequent, peaking at a significant 41% and 45% chance, before tapering off again towards the end of the year. This seasonal fluctuation highlights the diverse climate in Cayenne, making it essential for visitors to plan accordingly for both sunshine and rainfall.
In Cayenne, French Guiana, January beckons with a consistent 11 hours of daylight, setting a rhythmic pattern that continues through February. As the months progress into March, sunlight gently increases to 12 hours, a trend that remains stable through August, inviting longer days and ample opportunities for outdoor pursuits. As autumn approaches, the daylight duration starts to wane again, gradually dropping back to 11 hours by October and maintaining this shorter length through the end of the year. This cyclical dance of daylight not only influences the vibrant life in Cayenne but also creates a comforting predictability in the region's tropical climate.
In Cayenne, French Guiana, January ushers in a refreshing average wind speed of 5.2 m/s (12 mph), setting a breezy tone that lingers into the following months. As we move into February, winds pick up slightly to 6.0 m/s (14 mph), creating a lively atmosphere perfect for outdoor activities. However, by March, the winds begin to settle into a gentle rhythm, dropping back to 5.0 m/s (11 mph). The decline continues through the spring and into summer, with April seeing 4.4 m/s (10 mph) and May dipping further to 4.1 m/s (9 mph). This trend persists, with monthly averages falling to their annual lows in July at 2.8 m/s (6 mph) and August at 3.4 m/s (8 mph). The winds gradually strengthen again in the latter part of the year, as October brings 3.8 m/s (8 mph), and December concludes with a brisk 4.4 m/s (10 mph). Overall, January serves as a vibrant kickoff to a year marked by fluctuating winds, providing a unique charm to the coastal splendor of Cayenne.
Weather in Cayenne varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Cayenne, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between January and February, both months exhibit warm temperatures, with January experiencing a minimum of 23°C (74°F) and an average of 26°C (79°F), while February sees a slightly higher minimum of 24°C (75°F). The maximum temperatures are also comparable, with January peaking at 29°C (84°F) and February at 28°C (83°F).
Precipitation levels are slightly lower in February, with 189 mm (7.5 in) of rainfall over 24 days compared to January's 225 mm (8.9 in) over 23 days. Humidity levels are quite close as well, with January at 78% and February at 76%. For a more detailed look at February weather, you can visit Cayenne weather in February.
In January, temperatures in Cayenne range from a minimum of 23°C (74°F) to a maximum of 29°C (84°F), with an average of 26°C (79°F). This month experiences significant rainfall, totaling 225 mm (8.9 in) over 23 days, resulting in high humidity at 78%. In contrast, March sees slightly warmer temperatures, with lows of 24°C (75°F) and highs of 30°C (86°F), maintaining the same average of 26°C (80°F). While March has less rainfall at 196 mm (7.7 in) over 25 days, humidity levels are only marginally lower at 76%. For more detailed weather information, check out Cayenne weather in March.
In January, the weather features warm temperatures with a minimum of 23°C (74°F) and an average of 26°C (79°F), peaking at a maximum of 29°C (84°F). However, January also sees considerable rainfall, with 225 mm (8.9 in) of precipitation occurring over 23 days and a relative humidity of 78%.
In contrast, April experiences slightly warmer temperatures, ranging from a minimum of 24°C (75°F) to a maximum of 29°C (85°F), while maintaining an average of 26°C (80°F). April is notably wetter, with 390 mm (15.4 in) of precipitation spread across 27 days, and the humidity remains similar at 77%. For more specific details on April weather in Cayenne, you can visit Cayenne weather in April.
In January, the weather features warm temperatures ranging from a minimum of 23°C (74°F) to a maximum of 29°C (84°F), with an average temperature of 26°C (79°F). However, this month also sees significant precipitation, with 225 mm (8.9 in) falling over 23 days and maintaining a humidity level of 78%.
In comparison, May presents slightly higher temperatures, with minimums of 24°C (76°F) and maximums reaching 30°C (86°F), while the average remains similar at 26°C (80°F). Notably, May experiences a much higher total rainfall of 576 mm (22.7 in) over 30 days, sustaining the consistent humidity of 78%. For more details, check out Cayenne weather in May.
In January, the weather is typically warm with temperatures ranging from a minimum of 23°C (74°F) to a maximum of 29°C (84°F), and an average temperature of 26°C (79°F). However, January experiences significant rainfall, with 225 mm (8.9 in) over 23 days, and humidity levels at 78%. By June, the temperatures remain consistent with a minimum of 23°C (75°F) and an average of 26°C (79°F), but the maximum temperature climbs slightly to 30°C (86°F). June sees a considerable increase in precipitation, totaling 433 mm (17.1 in) over 29 days, coupled with higher humidity at 87%. For more detailed information, you can check Cayenne weather in June.
In January, the weather is characterized by slightly cooler temperatures, with average highs reaching 29°C (84°F) and a minimum of 23°C (74°F). This month experiences significant rainfall, totaling 225 mm (8.9 in) over approximately 23 days, with humidity around 78%.
In contrast, July sees a marginal increase in temperatures, with averages hovering around 30°C (87°F) for the maximum and a minimum of 24°C (75°F). Precipitation rises to 269 mm (10.6 in) over 29 days, contributing to a higher humidity level of 81%. For a more detailed overview, you can check the Cayenne weather in July.
In January, the weather is characterized by slightly cooler temperatures, with averages around 26°C (79°F) compared to August's 27°C (81°F). While both months experience high humidity, January has a min temperature of 23°C (74°F) and a maximum of 29°C (84°F), whereas August sees a min of 24°C (75°F) and a higher maximum of 32°C (89°F). Precipitation is significantly higher in January, with 225 mm (8.9 in) over 23 days, compared to just 92 mm (3.6 in) over 18 days in August. For a closer look at the conditions, you can explore Cayenne weather in August.
In comparing the weather of January and September, January tends to be cooler with average temperatures ranging from a minimum of 23°C (74°F) to a maximum of 29°C (84°F). It is also significantly wetter, receiving about 225 mm (8.9 in) of precipitation over 23 days, resulting in a humidity level of 78%. In contrast, September is warmer, with temperatures averaging between 24°C (76°F) and 32°C (90°F), and experiences much less rainfall, totaling only 56 mm (2.2 in) over 12 days. The humidity remains relatively stable at 79%. For a detailed look at September weather, check out Cayenne weather in September.
In comparing the weather between January and October, January tends to be slightly cooler with average temperatures ranging from a minimum of 23°C (74°F) to a maximum of 29°C (84°F). However, it experiences significantly higher precipitation, totaling 225 mm (8.9 in) over 23 days, paired with a humidity level of 78%. In contrast, October sees warmer temperatures, with a minimum of 25°C (77°F) and a maximum of 32°C (90°F), and experiences less rainfall, totaling 59 mm (2.3 in) over 16 days. Notably, October has a humidity level of 80%, making it feel quite muggy despite the warmer temperatures. For more details, you can visit Cayenne weather in October.
In comparison to January, November features slightly warmer temperatures, with average highs reaching up to 31°C (88°F) compared to January's maximum of 29°C (84°F). Both months experience substantial rainfall, but January sees a bit more precipitation at 225 mm (8.9 in) over 23 days, while November totals 204 mm (8.0 in) over 24 days. Additionally, November has a higher humidity level at 85%, compared to January’s 78%, making it feel a bit muggier. For more details on what to expect, check out Cayenne weather in November.
In comparison to December, January experiences slightly warmer average temperatures, with a minimum of 23°C (74°F) compared to December's 24°C (75°F). Both months share the same average temperature of 26°C (79°F), but January's maximum temperature is a bit lower at 29°C (84°F) versus December's 30°C (86°F). Precipitation levels also contrast significantly, with January receiving 225 mm (8.9 in) over 23 days, while December sees considerably more rain at 349 mm (13.7 in) across 29 days. Additionally, humidity is slightly lower in January at 78%, compared to December's 84%. For more weather details specific to December, visit Cayenne weather in December.
In January, Cayenne experiences a warm tropical climate, characterized by higher humidity levels and frequent precipitation compared to other months. While temperatures remain consistently warm, with averages around 26°C (79°F), the notable shift in weather patterns includes an increase in rainfall, with nearly three-quarters of the days seeing some drizzle. This combination of warmth and humidity can create a vibrant, lush environment, but visitors should be prepared for wet conditions. For a deeper dive into the year-round weather patterns, visit Cayenne Climate.