Warm
Average highs sit around 27°C, giving warm days by monthly-average standards.
September verdict
Heron Island, Australia in September
Weather score75Very good
Very good for holiday weather
Average highs sit around 27°C, giving warm days by monthly-average standards. Sunshine averages 8.9h per day, so bright days are a strong part of the month. Rainfall averages 27mm, which is relatively low for holiday planning.
September weather
Monthly averages
Temp
27°C
Rain
27mm
Sun
8.9h
Sea
22°C
Weather score
75
Very good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 27mm, which is relatively low for holiday planning.
Bright
Sunshine averages 8.9h per day, so bright days are a strong part of the month.
Swimmable
Sea temperatures average 22°C, which can work for swimming but may feel fresh.
Map
Weather map
Compare Heron Island, Australia with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September27°C average high
September is close to Heron Island's yearly temperature average, giving a typical read on daytime heat.
Warmest monthsJanuary to March and November to December
This stretch sets the upper range for average daytime heat.
Rain
September27mm average rain
September is one of Heron Island's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsApril to November
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September8.9 hours average sun
September is one of Heron Island's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsAugust to December
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September22°C average sea
September is one of the coolest sea months, so the water may feel fresher than in peak months.
Warmest seaJanuary to April and December
Sea temperatures are usually near 27°C in this stretch, so swimming comfort is at its strongest.
Weather score
September75 weather score
September scores above Heron Island's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsMarch to April and September to December
These months have the strongest weather score in the monthly averages.