Last updated: August 21, 2025
December in Kourou, French Guiana is characterized by a tropical climate, boasting a maximum temperature of 29°C (85°F) and a pleasant average of 26°C (79°F). The month experiences a minimum temperature of 23°C (74°F), creating a warm environment ideal for outdoor activities. However, the weather is also marked by significant rainfall, with 322 mm (12.7 in) of precipitation spread across all 30 days, contributing to a high humidity level of 79%. This combination of warmth and moisture results in lush surroundings, making December a captivating time to explore this vibrant region.
In December, Kourou, French Guiana, showcases consistent warmth that characterizes its tropical climate. The temperatures range from a minimum of 23°C (74°F) to a maximum of 29°C (85°F), with an average hovering around 26°C (79°F). This month mirrors trends seen throughout the year, maintaining a delightful warmth similar to previous months, reflecting a stable climate with minor variations. December’s weather invites visitors to enjoy the diverse outdoor activities and lush surroundings, providing a perfect backdrop for exploration and relaxation in this vibrant region.
In December, Kourou, French Guiana, experiences a significant surge in precipitation, with 322 mm (12.7 in) of rainfall over 30 days. This marks a notable increase compared to the preceding month, November, which saw 212 mm (8.3 in). December’s rainfall is a continuation of the region's wet season, with consistently high monthly totals from April through June, where May recorded the peak at 541 mm (21.3 in). Interestingly, the frequency of rainy days stays quite high throughout the month, aligning with the region's climate trends that suggest a wetter end to the year. The wettest months clearly dominate the yearly precipitation pattern, emphasizing Kourou’s lush, tropical environment as it transitions into the new year.
In December, Kourou, French Guiana experiences a notable uptick in humidity, soaring to 79%. This is part of a broader trend observed throughout the year, where moisture levels peak during the mid-year months; notably, June reaches a high of 86%. After a drop in humidity during the late summer and early fall, with September and October registering at 62% and 63% respectively, December signals a shift towards a more humid environment as the year draws to a close. Despite the fluctuating levels, the overall pattern shows a consistent tendency for December to be more humid than the preceding months, setting the stage for the warmth and tropical climate that defines Kourou's unique weather narrative.
In Kourou, French Guiana, the UV Index remains consistently high throughout the year, indicative of an extreme sun exposure category. December sees a slight dip to a UV Index of 12, maintaining the trend of intense sun sensitivity that characterizes this region. Remarkably, despite minor fluctuations, the Index hovers between 12 and 16 across the months, emphasizing the need for precautions against sunburn, with a typical burn time of just 10 minutes. This sustained high exposure underscores the importance of protective measures for residents and visitors alike to safely enjoy Kourou's vibrant outdoor lifestyle. For detailed monthly insights, visit Kourou UV Index.
UV Risk Categories
In December, Kourou, French Guiana, enjoys a generous 268 hours of sunshine, contributing to the region's vibrant atmosphere. As the year comes to a close, the sunshine hours reflect a gradual tapering from the intense light of August and September, which boast over 340 hours each. The trend highlights a distinct peak in mid-year, specifically July, known for its 315 hours, while March also stands out with 301 hours, suggesting a springtime abundance of bright days. Overall, the sunshine hours in Kourou illustrate a remarkable seasonal rhythm, with December offering a beautifully balanced transition into the cooler months ahead, ensuring that this South American gem continues to bask in warmth even as the year wraps up.
In Kourou, French Guiana, the likelihood of sunny weather in December is notably low, with only an 8% chance of sunshine. This sharp decline marks a significant contrast to the warmer months of August and September, where the sun shines brightly 36% and 42% of the time, respectively. As the year progresses towards December, the trend reveals a consistent drop in sunny days; starting from a modest 30% in October and further diminishing to just 17% in November. With the wet season peaking in December, residents and visitors alike should prepare for overcast skies and rain rather than basking in the tropical sun.
In Kourou, French Guiana, December marks the return of shorter days, with daylight lasting 11 hours—a pattern echoed in both January and February. This period transitions from the longer days of earlier months, where daylight reaches up to 12 hours from March through October. The data reveals a distinct rhythm: as the year draws to a close, daylight gradually shortens, creating a lull that contrasts with the brighter months following the sunniest periods from March to September. If you’re in Kourou in December, expect a balance of light and shadow, inviting you to savor the warm evenings as the sun gently recedes.
In December, Kourou experiences a noticeable uptick in wind speed, averaging 4.2 m/s (9 mph), which marks a modest improvement from the calmer months prior, particularly the summer lull of 2.7 m/s in July. As the year draws to a close, the winds pick up slightly, hinting at a shift in the atmospheric patterns that characterize the region. This trend of gradual increase from the summer's almost still breezes to a more lively December reflects the transitional nature of Kourou's climate, where the winds can be a welcome companion to the tropical warmth. Overall, December winds offer a refreshing change, bridging the quieter months with the promise of more breezy days ahead.
Weather in Kourou varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Kourou, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, temperatures typically range from a minimum of 23°C (74°F) to a maximum of 29°C (85°F), with an average of 26°C (79°F). The month sees significant rainfall, totaling 322 mm (12.7 in) over 30 days, and humidity is high at 79%. In contrast, January maintains the same temperature range, but experiences less precipitation, with only 202 mm (8.0 in) falling over 23 days and a decrease in humidity to 70%. This makes January slightly drier and less humid compared to December, resulting in a more comfortable weather experience overall. For more details, you can check Kourou weather in January.
December and February share similar average temperatures, both ranging from a minimum of 23°C (74°F) to a maximum of 29°C (85°F). However, December is significantly wetter, experiencing 322 mm (12.7 in) of precipitation over 30 days, compared to February's 172 mm (6.8 in) across 23 days. Additionally, February boasts a lower humidity level of 66%, while December's humidity is at a higher 79%. For a deeper look into February's weather specifics, you can visit Kourou weather in February.
In comparing the weather between December and March, both months exhibit a similar temperature range, with averages around 26°C (79°F) and maximums peaking at 29°C (85°F). However, December experiences significantly higher precipitation levels at 322 mm (12.7 in) over 30 days, resulting in a much more humid atmosphere with 79% humidity. In contrast, March sees reduced rainfall at 191 mm (7.5 in) over 25 days and lower humidity levels at 66%. This marked difference in precipitation and humidity contributes to a generally drier feel in March. For more detailed information, check out Kourou weather in March.
When comparing the weather between December and April, we see some interesting similarities and differences. Both months exhibit the same temperature range, with minimums at 23°C (74°F), averaging 26°C (79°F), and maxing out at 29°C (85°F). However, April experiences slightly higher precipitation, totaling 375 mm (14.8 in) over 28 days, compared to December's 322 mm (12.7 in) over 30 days. Additionally, April features lower humidity at 66%, as opposed to December's higher humidity level of 79%. For more detailed information, check out Kourou weather in April.
In comparing the weather between December and May, both months feature similar average temperatures, around 26°C (79°F). However, December tends to be slightly cooler, with maximum temperatures reaching only 29°C (85°F) compared to May's 30°C (86°F). Precipitation levels are notably higher in May, with a total of 541 mm (21.3 in) compared to December's 322 mm (12.7 in), indicating that May can be quite wet despite its similar temperature profile. Furthermore, December experiences higher humidity at 79%, while May's humidity is more comfortable at 68%. For more detailed information, you can check out Kourou weather in May.
December and June share similar average temperatures, with both months ranging from a minimum of 23°C (74°F) to an average of 26°C (79°F). However, June tends to be warmer overall, peaking at a maximum of 30°C (87°F) compared to December's 29°C (85°F). Additionally, June experiences significantly higher precipitation at 448 mm (17.6 in), compared to December's 322 mm (12.7 in), reflecting a wetter season. Humidity also rises in June, averaging 86% versus December's 79%. For a detailed look at weather patterns, check out Kourou weather in June.
When comparing the weather in December and July, both months feature a similar temperature range. December sees a minimum of 23°C (74°F), an average of 26°C (79°F), and a maximum of 29°C (85°F), while July has a slightly warmer maximum temperature of 31°C (88°F), although both months maintain the same minimum and average temperatures. Precipitation levels are higher in December, with 322 mm (12.7 in) of rainfall spread across 30 days, compared to July's 259 mm (10.2 in) over 29 days. Humidity is also slightly elevated in December at 79%, compared to July's 76%. For more detailed information on July weather, you can check out Kourou weather in July.
In comparing the weather between December and August, December offers a slightly cooler average temperature, ranging from a minimum of 23°C (74°F) to a maximum of 29°C (85°F), while August is warmer, with average temperatures from 23°C (74°F) to 31°C (88°F). Precipitation levels in December are significantly higher at 322 mm (12.7 in) over 30 days, compared to August's 114 mm (4.5 in) spread over 21 days, resulting in a much wetter month for December. Additionally, December has a higher humidity level at 79%, while August boasts a more comfortable 65%. For more details on the weather in August, you can check Kourou weather in August.
When comparing the weather in December and September, it’s evident that both months experience warm temperatures, though December tends to be slightly cooler with average highs of 29°C (85°F) compared to September's max of 31°C (88°F). September also has a lower minimum temperature of 24°C (75°F) compared to December's minimum of 23°C (74°F). Precipitation levels differ significantly; December receives a hefty 322 mm (12.7 in) spread across 30 days, whereas September has a much more manageable 92 mm (3.6 in) over just 16 days, resulting in less humidity in September at 62%, compared to December's 79%. For more detailed information about September weather, you can check Kourou weather in September.
December's weather presents a noticeable shift compared to October, with a slightly lower minimum temperature of 23°C (74°F) compared to October's 24°C (76°F). Although the average temperature in December is similar at 26°C (79°F), the maximum temperature dips to 29°C (85°F), whereas October boasts a higher maximum of 31°C (88°F). December experiences significantly more rainfall, with 322 mm (12.7 in) over 30 days, compared to just 69 mm (2.7 in) over 18 days in October. Additionally, the humidity in December is higher at 79%, in contrast to a lower 63% in October. For a closer look at October weather specifics, visit Kourou weather in October.
In comparing the weather between November and December, we see a slight rise in average temperature, with December's averages at 26°C (79°F) compared to November's 27°C (80°F). However, December experiences significantly higher precipitation, with 322 mm (12.7 in) over 30 days, compared to November's 212 mm (8.3 in) over 25 days. Additionally, humidity increases in December to 79%, up from November's 74%. Overall, December is wetter and slightly cooler, while November is warmer with less rainfall. For more detailed insights, you can check Kourou weather in November.
As December unfolds in Kourou, the weather showcases its unique charm, marked by humid conditions and frequent rainfall, distinguishing it from the drier months. With temperatures averaging a pleasant 26°C (79°F), it remains warm but is accompanied by a significant increase in precipitation, averaging 322 mm over the month. This sets December apart as a peak period for rain, with nearly every day seeing some level of drizzle, creating a lush and vibrant environment. If you're planning a visit and want to know more about what to expect from Kourou's climate, check out Kourou Climate for additional insights.