Climate Overview
The climate in Great Corn Island is hot. The average annual temperature is 27°C and approximately 2665mm of precipitation falls per year. Great Corn Island receives a notable amount of rainfall throughout the year, including during its driest month. Great Corn Island is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: September, August, June. The coldest months are January, February, December, when temperatures can drop to 25°C.
Temperature
Great Corn Island 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
Great Corn Island is a very wet location, receiving approximately 2665mm of precipitation annually, which averages out to around 222mm per month. The wettest month is November, averaging 393mm of rainfall. October and July also tend to see above-average precipitation. The driest month is March, with just 38mm. That's 354mm less than November, 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
Great Corn Island is moderately windy, with an average annual wind speed of 27km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 31km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in September, 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 10km/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 31km/h in winter, 26km/h in spring, 27km/h in summer, 23km/h in autumn.
Seasons
89 days until Summer
It is currently spring in Great Corn Island, which began on March 20, 2026. Great Corn Island is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. 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 28°C. Precipitation is moderate at around 291mm for the season, averaging 97mm per month. Winds are strong, averaging 26km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 26 to 28°C. Rainfall is heavy, totalling around 1002mm across the season with a monthly average of 334mm. Winds are strong, averaging 27km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 26 to 28°C. Rainfall is heavy, totalling around 1026mm across the season with a monthly average of 342mm. Winds are moderate at around 23km/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 346mm across the season with a monthly average of 115mm. Winds are strong, averaging 31km/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 Great Corn Island 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.
