Cayenne
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Cayenne Weather in September

September in Cayenne brings very high temperatures, with highs of 32°C (90°F) and nights dropping to 24°C (75°F). It's also the driest month of the year, ideal for those who want to avoid rain.

Rainfall in Cayenne in September

As the driest month, it's a great time for hiking and exploring the area. Typically, you can expect about 5 days of rain this month, with 65 mm (2.6 in) on average. Although rain is not especially frequent, individual showers can still be quite heavy.

Temperature in Cayenne in September

September in Cayenne brings very high temperatures, with highs of 32°C (90°F) and nights around 24°C (75°F). Indoor breaks or shaded spots can make the warmer part of the day much more comfortable. At 24°C (75°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.

Sunshine in Cayenne in September

Enjoy a sunny month with about 255 hours of sunshine, the clear skies make Cayenne even more beautiful.

Wind Speed in Cayenne in September

Wind speeds average 3 m/s (6 knots) during September. At this speed, light breezes keep leaves and small twigs in gentle motion while the wind also provides natural cooling. Since this is an average, some days are more tranquil while others have more persistent light winds that are more noticeable.

Average water temperature in September

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.

Cayenne Temperature in September

Min Temperature
24°C (75°F)
Max Temperature
32°C (90°F)
Water Temperature
28°C (82°F)
Chance of Rain
15%
Precipitation
65 mm (2.6 in)
Rainy days
5 days
Humidity
71%
Windspeed
3 m/s (6 knots)
Sunshine
255 hours
Percentage Sunshine

Cayenne Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Cayenne - and find the best time to visit.

Daily Historical Temperatures

46-year average (1976-2025)

Based on our historical records, temperatures in Cayenne typically stay consistent throughout September, with daily highs averaging around 32°C (90°F). Nights are warm, with lows around 23°C (73°F).

Average temperatures in September

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 September

Historical weather records for Cayenne in September

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.

Cayenne historical weather extremes in September

Based on 34 years of weather observations in Cayenne between 1992 and 2026, these are the recorded extremes.

  • The warmest day in September was on September 12, 1995, with a maximum of 36°C (97°F).
  • On September 26, 1999, Cayenne saw its coldest September day with temperatures maxing out at 26°C (79°F).
  • Cayenne registered its coldest September night on September 11, 1997, with temperatures dropping to 20°C (68°F).

Best Places in French Guiana in September

Find out more about the weather in French Guiana and which places have the best travel conditions in this month. See all of French Guiana in September →

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

What to Wear in Cayenne in September

Warm weather calls for comfortable, breathable clothing in September. 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). Rain is likely on several days, so bring a good rain jacket. With water temperatures around 28°C (82°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Cayenne in September

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

  • Swimming
    9/10
  • Cycling
    8/10
  • Walking
    8/10
  • Camping
    8/10
  • Outdoor sports
    8/10

Cayenne 3-Day Forecast

Popular in September

Where to go in September - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.