Climate Overview
The climate in Onga is hot. The average annual temperature is 25°C and approximately 1401mm of precipitation falls per year. November is the wettest month, receiving around 193mm of rainfall. Onga sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Onga has relatively stable temperatures year-round, staying within a 10°C range. The warmest month is March, when average highs reach 31°C and the mean temperature sits around 26°C. July is the coolest month, with minimum temperatures around 21°C and an average of 24°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows.
Precipitation
Onga is a fairly wet location, receiving approximately 1401mm of precipitation annually, which averages out to around 117mm per month. The wettest month is November, averaging 193mm of rainfall. October and April also tend to see above-average precipitation. The driest month is July, with just 28mm. That's 166mm 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
Onga is relatively calm, with an average annual wind speed of 11km/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 13km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 9km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 4km/h gap between the calmest and windiest months.
Seasons
89 days until Winter
It is currently autumn in Onga, which began on March 20, 2026. Onga sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in March at around 31°C, while the coldest stretch bottoms out in July near 21°C. Winter is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 21 to 29°C. Rainfall is heavy, totalling around 500mm across the season with a monthly average of 167mm. Winds are generally light, averaging 10km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 22 to 30°C. Rainfall is heavy, totalling around 332mm across the season with a monthly average of 111mm. Winds are generally light, averaging 11km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 22 to 31°C. Rainfall is heavy, totalling around 453mm across the season with a monthly average of 151mm. Winds are generally light, averaging 10km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 21 to 29°C. Rainfall is relatively light, with around 116mm over the season and a monthly average of 39mm. Winds are generally light, averaging 12km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit Onga is during June, July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 24°C with modest rainfall averaging 39mm per month. By contrast, March can be uncomfortably hot with temperatures reaching 31°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.
Monthly Climate Data
The table below shows monthly climate averages for Onga 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.
