Climate Overview
The climate in Nueva Guinea is hot. The average annual temperature is 25°C and approximately 2139mm of precipitation falls per year. Nueva Guinea receives a notable amount of rainfall throughout the year, including during its driest month. Nueva Guinea is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: April, May, September. The coldest months are January, February, March, when temperatures can drop to 21°C.
Temperature
Nueva Guinea has relatively stable temperatures year-round, staying within a 10°C range. The warmest month is April, when average highs reach 31°C and the mean temperature sits around 26°C. January 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 7°C between highs and lows.
Precipitation
Nueva Guinea is a very wet location, receiving approximately 2139mm of precipitation annually, which averages out to around 178mm per month. The wettest month is October, averaging 316mm of rainfall. June and May also tend to see above-average precipitation. The driest month is March, with just 60mm. That's 256mm less than October, 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
Nueva Guinea is relatively calm, with an average annual wind speed of 3km/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 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.
Seasons
89 days until Autumn
It is currently summer in Nueva Guinea, which began on June 21, 2026. Nueva Guinea 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 April at around 31°C, while the coldest stretch bottoms out in January near 21°C. Autumn is next, beginning on September 23, 2026 — 89 days from now.
Spring
Temperatures range from 22 to 31°C. Rainfall is heavy, totalling around 387mm across the season with a monthly average of 129mm. Winds are generally light, averaging 3km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 23 to 30°C. Rainfall is heavy, totalling around 722mm across the season with a monthly average of 241mm. Winds are generally light, averaging 3km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 23 to 30°C. Rainfall is heavy, totalling around 741mm across the season with a monthly average of 247mm. Winds are generally light, averaging 2km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 21 to 28°C. Precipitation is moderate at around 289mm for the season, averaging 96mm per month. Winds are generally light, averaging 3km/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 Nueva Guinea is during January and February, when the weather is most comfortable for travellers. During these months, average temperatures hover around 24°C with modest rainfall averaging 74mm per month. By contrast, April can be uncomfortably hot with temperatures reaching 31°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.
Monthly Climate Data
The table below shows monthly climate averages for Nueva Guinea 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.
