Climate Overview
The climate in Gizo is hot. The average annual temperature is 27°C and approximately 3789mm of precipitation falls per year. Gizo receives a notable amount of rainfall throughout the year, including during its driest month. Gizo sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Gizo has relatively stable temperatures year-round, staying within a 3°C range. The warmest month is January, when average highs reach 29°C and the mean temperature sits around 28°C. August is the coolest month, with minimum temperatures around 26°C and an average of 27°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows.
Precipitation
Gizo is a very wet location, receiving approximately 3789mm of precipitation annually, which averages out to around 316mm per month. The wettest month is February, averaging 411mm of rainfall. December and March also tend to see above-average precipitation. The driest month is October, with just 217mm. That's 194mm less than February, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.
Wind
Gizo is moderately windy, with an average annual wind speed of 23km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is August, averaging 27km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in March, with average winds dropping to 19km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 8km/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 26km/h in winter, 22km/h in spring, 22km/h in summer, 20km/h in autumn.
Seasons
90 days until Winter
It is currently autumn in Gizo, which began on March 20, 2026. Gizo sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in January at around 29°C, while the coldest stretch bottoms out in August near 26°C. Winter is next, beginning on June 21, 2026 — 90 days from now.
Spring
Temperatures range from 26 to 28°C. Rainfall is heavy, totalling around 751mm across the season with a monthly average of 250mm. Winds are moderate at around 22km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 27 to 29°C. Rainfall is heavy, totalling around 1155mm across the season with a monthly average of 385mm. Winds are moderate at around 22km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 27 to 28°C. Rainfall is heavy, totalling around 1012mm across the season with a monthly average of 337mm. Winds are moderate at around 20km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 26 to 28°C. Rainfall is heavy, totalling around 871mm across the season with a monthly average of 290mm. Winds are strong, averaging 26km/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 Gizo 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.
