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Cayenne Weather by Month
Average temperatures, rainfall and humidity for Cayenne, France, month by month, built from OpenWeather's historical records. Use it to see what a typical Cayenne month looks like before you travel — then check the live Cayenne forecast for the days ahead.
Warmest month
September
33°C average high
Coolest month
January
23°C average low
Wettest month
May
146 mm of rain
Driest month
October
31 mm of rain
Average temperature and rainfall in Cayenne by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 30°C | 23°C | 20°C / 36°C | 48 mm | 82% | 12 km/h |
| February | 30°C | 23°C | 20°C / 34°C | 50 mm | 81% | 13 km/h |
| March | 31°C | 24°C | 20°C / 35°C | 55 mm | 80% | 13 km/h |
| April | 30°C | 24°C | 21°C / 56°C | 84 mm | 82% | 12 km/h |
| May | 30°C | 24°C | 22°C / 34°C | 146 mm | 85% | 11 km/h |
| June | 30°C | 24°C | 22°C / 35°C | 113 mm | 86% | 10 km/h |
| July | 31°C | 24°C | 22°C / 36°C | 82 mm | 84% | 10 km/h |
| August | 32°C | 24°C | 22°C / 37°C | 58 mm | 81% | 10 km/h |
| September | 33°C | 25°C | 22°C / 37°C | 34 mm | 79% | 11 km/h |
| October | 33°C | 25°C | 22°C / 38°C | 31 mm | 79% | 12 km/h |
| November | 32°C | 24°C | 22°C / 36°C | 55 mm | 81% | 12 km/h |
| December | 30°C | 24°C | 20°C / 35°C | 71 mm | 83% | 12 km/h |
Best time to visit Cayenne
The most comfortable time to visit Cayenne is generally January to March, balancing mild daytime temperatures against the driest stretch of the year. Temperatures stay fairly even all year and rain concentrates around May, totalling about 826 mm a year.
Travellers who prefer heat should aim for September, when highs average 33°C. May is the month to avoid if rain would spoil your plans — it averages 146 mm, roughly 5× the rainfall of October.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Cayenne forecast for what is happening now.