Country Overview For French Guiana
The climate in French Guiana is typically tropical; hot, humid; little seasonal temperature variation. For Cayenne in January the daily average maximum temperatures is 29°C with the average minimum 23°C, while in June the average maximum is 31°C with a minimum of 23°C. The wettest month for Cayenne is May with an average of 448.9mm of precipitation falling while the driest month is October with 40.8mm falling.
HISTORICAL MONTHLY AVERAGES FOR OCTOBER
The information presented below gives detailed historical monthly average weather conditions along with exceptional weather occurrences. To maintain relevance to current weather trends the displayed information has been calculated using data collected over the past two decades. The climate profile is taken from closest available data source to St Laurent Du Maron.
Throughout the month of October daytime temperatures will generally reach highs of around 33°C that's about 92°F. At night the average minimum temperature drops down to around 23°C, that's 74°F.
In recent times the highest recorded temperature in October has been 36°C that's 97°F, with the lowest recorded temperature 21°C, about 70°F.
The average daily relative humidity for October is around 72%.
The Heat Index is a measure of how hot it feels when relative humidity is added to actual air temperature. From this a comfort level is calculated providing categories on how heat conditions might adversely affect someone.
Comfort Levels: Given average maximum temperatures and humidity levels you can expect dangerous heat conditions. Sunstroke, muscle cramps and heat exhaustion are likely. Heatstroke is possible with prolonged exposure and/or physical activity (see heat index for more information).
The average monthly amount of precipitation has been recorded at around 0 mm, that's 0 inches. Throughout the month you can expect to see rain or drizzle falling on 7 days of the month.
The average daily wind speed in October has been around 7 km/h, that’s the equivalent to about 4 mph, or 4 knots. In recent years the maximum sustained wind speed has reached 44 km/h, that’s the equivalent of around 28 mph, or 24 knots.
On average the month of October is affected by foggy conditions on 9 days.
YEARLY TRENDS: WEATHER AVERAGES & EXTREMES
The following charts show yearly weather trends with information on monthly weather averages and extremes.
The chart below plots the average high and low temperature for each month of the year. It also shows the maximum and minimum recorded temperatures.
The chart below plots the average monthly precipitation amount.
The chart below plots the average number of days in any month that you can expect to see rain falling.
The chart below plots the average daily wind speed you can expect for any month. It also shows the maximum recorded sustained wind speed for each month.