Climate Overview
The climate in Kourou is hot. The average annual temperature is 27°C and approximately 3010mm of precipitation falls per year. Kourou receives a notable amount of rainfall throughout the year, including during its driest month. Kourou sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Kourou has relatively stable temperatures year-round, staying within a 3°C range. The warmest month is September, when average highs reach 28°C and the mean temperature sits around 27°C. January is the coolest month, with minimum temperatures around 25°C and an average of 26°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows.
Precipitation
Kourou is a very wet location, receiving approximately 3010mm of precipitation annually, which averages out to around 251mm per month. The wettest month is May, averaging 589mm of rainfall. June and April also tend to see above-average precipitation. The driest month is September, with just 38mm. That's 551mm less than May, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.
Wind
Kourou is moderately windy, with an average annual wind speed of 25km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 30km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in July, with average winds dropping to 21km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 9km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 28km/h in winter, 28km/h in spring, 21km/h in summer, 24km/h in autumn.
Seasons
89 days until Summer
It is currently spring in Kourou, which began on March 20, 2026. Kourou sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in September at around 28°C, while the coldest stretch bottoms out in January near 25°C. Summer is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 26 to 27°C. Rainfall is heavy, totalling around 1184mm across the season with a monthly average of 395mm. Winds are strong, averaging 28km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 25 to 28°C. Rainfall is heavy, totalling around 691mm across the season with a monthly average of 230mm. Winds are moderate at around 21km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 26 to 28°C. Precipitation is moderate at around 265mm for the season, averaging 88mm per month. Winds are moderate at around 24km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 25 to 27°C. Rainfall is heavy, totalling around 870mm across the season with a monthly average of 290mm. Winds are strong, averaging 28km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
The table below shows monthly climate averages for Kourou based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
