Warm
Average highs sit around 29°C, giving warm days by monthly-average standards.
September verdict
Bougainville, Papua New Guinea in September
Weather score54Mixed
Mixed for holiday weather
Average highs sit around 29°C, giving warm days by monthly-average standards. Sunshine averages 5.3h per day, enough for a balanced month. Rainfall averages 327mm, so showers are a real planning factor.
September weather
Monthly averages
Temp
29°C
Rain
327mm
Sun
5.3h
Sea
29°C
Weather score
54
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 327mm, so showers are a real planning factor.
Some sun
Sunshine averages 5.3h per day, enough for a balanced month.
Warm sea
Sea temperatures average 29°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Bougainville, Papua New Guinea with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September29°C average high
September is close to Bougainville's usual daytime heat, with little temperature swing across the year.
Warmest monthsAll year
Daytime heat stays consistently warm through the year.
Rain
September327mm average rain
September sits near Bougainville's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to February, May to June, and November to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September5.3 hours average sun
September is close to Bougainville's usual sunshine level, with limited seasonal swing across the year.
Brightest monthsJanuary, March to June, and August to December
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September29°C average sea
September is part of a consistently warm sea-temperature pattern, so swimming comfort changes little through the year.
Warmest seaAll year
Sea temperatures stay warm enough for easy swimming through the year.
Weather score
September54 weather score
September is close to Bougainville's usual weather score, with limited month-to-month change.
Best weather monthsAll year
The weather score stays consistently strong through the year.