French Guiana (Cayenne)
December
Weather in French Guiana for December 2025
Your guide to French Guiana weather in December - trends and predictions
In general, the average temperature in French Guiana at the beginning of December is 28.9 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 27.9 °C by the end of December.
French Guiana experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 267.4 mm.
Temperatures
Rain 🌧️
1
Dry days
30
Rainy days
0
Snow days
28°/23°
Temperatures
12 km/h
Avg max wind
86 %
Avg humidity
French Guiana in December average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  29° | 2  29° | 3 29° | 4 29° | 5 29° | 6  29° | 7 28° |
| 8 29° | 9 29° | 10 28° | 11  30° | 12 29° | 13 29° | 14 29° |
| 15 29° | 16 28° | 17 28° | 18 28° | 19 28° | 20 28° | 21 27° |
| 22 28° | 23 26° | 24 27° | 25 26° | 26  28° | 27 27° | 28 29° |
| 29 28° | 30 28° | 31 29° |
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Temperatures trend during December in French Guiana
See the weather trend as well as the moving average line
December weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. | Patchy rain possible | 29° /23° | 3.6 mm | 6 | |
| 2 Dec. | Partly cloudy | 29° /23° | 13 mm | 7 | |
| 3 Dec. | Patchy rain possible | 29° /23° | 6.8 mm | 7 | |
| 4 Dec. | Light rain shower | 29° /23° | 6.6 mm | 6 | |
| 5 Dec. | Light rain shower | 29° /23° | 8.2 mm | 6 | |
| 6 Dec. | Patchy light rain with thunder | 29° /23° | 8.9 mm | 7 | |
| 7 Dec. | Light rain shower | 28° /22° | 7.1 mm | 6 | |
| 8 Dec. | Light rain shower | 29° /22° | 10.6 mm | 6 | |
| 9 Dec. | Light rain shower | 29° /22° | 6.9 mm | 6 | |
| 10 Dec. | Light rain shower | 28° /22° | 7 mm | 6 | |
| 11 Dec. | Patchy light drizzle | 30° /23° | 1.7 mm | 7 | |
| 12 Dec. | Light rain shower | 29° /23° | 3.4 mm | 6 | |
| 13 Dec. | Patchy rain possible | 29° /23° | 4.9 mm | 7 | |
| 14 Dec. | Patchy rain possible | 29° /23° | 3.3 mm | 7 | |
| 15 Dec. | Light rain shower | 29° /23° | 2.8 mm | 6 | |
| 16 Dec. | Light rain shower | 28° /23° | 12.3 mm | 6 | |
| 17 Dec. | Light rain shower | 28° /23° | 16.8 mm | 6 | |
| 18 Dec. | Light rain shower | 28° /23° | 16.6 mm | 7 | |
| 19 Dec. | Light rain shower | 28° /23° | 9 mm | 6 | |
| 20 Dec. | Light rain shower | 28° /23° | 9.6 mm | 6 | |
| 21 Dec. | Light rain shower | 27° /23° | 9.7 mm | 6 | |
| 22 Dec. | Light rain shower | 28° /23° | 11.8 mm | 6 | |
| 23 Dec. | Light rain shower | 26° /23° | 17.8 mm | 6 | |
| 24 Dec. | Light rain shower | 27° /22° | 19.9 mm | 6 | |
| 25 Dec. | Light rain shower | 26° /22° | 18.8 mm | 6 | |
| 26 Dec. | Moderate or heavy rain shower | 28° /22° | 9.1 mm | 6 | |
| 27 Dec. | Light rain shower | 27° /22° | 6 mm | 6 | |
| 28 Dec. | Moderate or heavy rain shower | 29° /23° | 9.2 mm | 6 | |
| 29 Dec. | Moderate or heavy rain shower | 28° /23° | 4.6 mm | 6 | |
| 30 Dec. | Light rain shower | 28° /22° | 7 mm | 6 | |
| 31 Dec. | Patchy rain possible | 29° /22° | 4.8 mm | 6 | |
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Important Notice
Our weather forecast for French Guiana in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the French Guiana forecast closer to your planned date for the most up-to-date weather information.
French Guiana in December - FAQ
What are the expected maximum and minimum temperatures in French Guiana during December?
During December, expect a variety of temperatures with highs around 28° and lows near 23°, suitable for diverse activities and preferences.
How much rainfall should be expected in French Guiana during December?
Significant rainfall exceeding 267.4 mm is expected in French Guiana during December, occurring over more than 30 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in French Guiana during December?
The average wind speed in French Guiana during December is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in French Guiana
Explore the daily rainfall trends and prepare for French Guianas December weather 💧
UV exposure in French Guiana during December
Stay informed about UV levels for safe outdoor activities throughout the month of December ☀️
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