Cayenne weather in July
Temperature, sea and sunshine in July: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in July
Fair
Best time to visit: January – March, September – October
What is the weather like in Cayenne in July?
In July, Cayenne is hot: daytime highs average 29 °C, and even at night it stays warm at around 23 °C. The sea averages 28.4 °C – lovely and warm for swimming. The sun shines for around 7 hours a day. It is the rainy season: rain falls on about 27 days, totalling 247 mm. On about 5 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, July is a so-so month for a holiday in Cayenne.
July compared
How the weather changes from June to August. Tap a month to open it.
More details for July
- Daylight
- 12 h 23 min06:24 – 18:47
- UV index
- 13 · extremeclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 13 km/haverage daily peakAll months
- Cloud cover
- 64 %on averageAll months
- Hot days
- 5 days30 °C or moreAll months
- Time zone
- UTC−3America/Cayenne
How the score comes together
- Temperatureweight 50 %75 %
- Sunshineweight 20 %58 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in July
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
Cayenne in July: quick answers
Is Cayenne hot in July?
Yes. In July, Cayenne is hot: daytime highs average 29 °C and nights stay around 23 °C. On about 5 days the thermometer climbs to 30 °C or more.
Can you swim in Cayenne in July?
Yes. In July the sea averages 28.4 °C – lovely and warm for swimming.
Does it rain much in Cayenne in July?
It rains often – on about 27 days, adding up to 247 mm.
Cayenne month by month
The whole year in CayenneAll destinations: French GuianaWhere to go in JulySea temperature in July
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences