Cayenne Weather in December

Cayenne in December averages 30°C (86°F) during the day and 24°C (75°F) at night. December is part of the rainy season, so frequent rainfall is typical.

Rainfall in Cayenne in December

As part of the rainy season, Cayenne sees around 18 days of rain in December, with an average of 270 mm (11 in). Rain during the rainy season here tends to be intense rather than just persistent drizzle. Expect significant downpours, often in the late afternoon.

Temperature in Cayenne in December

In December, expect very high temperatures in Cayenne, with highs of 30°C (86°F) and lows of 24°C (75°F) at night. Mornings and evenings are often more comfortable than the peak afternoon hours. With lows around 24°C (75°F), the nights are warm enough that a sheet is usually all you need for bedding.

Sunshine in Cayenne in December

The area enjoys a moderate level of sunlight, with around 152 hours. It's a good balance between sunny and rainy days.

Wind Speed in Cayenne in December

Average wind speeds reach 3 m/s (6 knots) in December, creating light breezes that feel pleasant throughout the day. Some days are calmer, while others bring slightly more active breezes.

Average water temperature in December

The water temperature is 28°C (82°F), which most people find very comfortable. A good month for swimming and water sports.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. September typically offers the best weather for Cayenne.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit French Guiana, check out our Cayenne's climate page.

Cayenne Temperature in December

Min Temperature 24°C (75°F)  

Max Temperature 30°C (86°F)  

Water Temperature 28°C (82°F)  

Chance of Rain 60%  

Precipitation 270 mm (11 in)  

Rainy days 18 days  

Humidity 80%  

Windspeed 3 m/s (6 knots)  

Sunshine 152 hours  

Percentage Sunshine  

Daily Historical Temperatures

46-year average (1976-2025)

Based on our historical records, temperatures in Cayenne typically stay consistent throughout December, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 23°C (73°F).

Average temperatures in December

‹ Select year to compare to 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 ›

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

‹ January February March April May June July August September October November December ›

Daily Historical Precipitation

46-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in December

‹ Select year to compare to 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 ›

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

‹ January February March April May June July August September October November December ›

Historical weather for Cayenne in December

Browse day-by-day weather records for Cayenne spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

‹ 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 ›

‹ January February March April May June July August September October November December ›

Cayenne historical weather extremes in December

Based on weather observations in Cayenne between 2002 and 2025, these are the recorded extremes during December.

• The hottest December day on record in Cayenne reached 34°C (93°F) (December 3, 2004).
• On December 22, 2009, Cayenne saw its coldest December day with temperatures maxing out at 25°C (77°F).
• Cayenne registered its coldest December night on December 30, 2018, with temperatures dropping to 21°C (70°F).
• The heaviest December precipitation occurred on December 12, 2014, when 133 mm (5.2 in) of precipitation fell.

What to Wear in Cayenne in December

Warm weather calls for comfortable, breathable clothing in December. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. Expect water temperatures of around 28°C (82°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Cayenne in December

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

7/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit French Guiana, check out our Cayenne's climate page.

More climate data for Cayenne

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Cayenne climate overview or explore weather in French Guiana.