Mild
Average highs are around 21°C, so days are mild rather than hot.
September verdict
Mixed for holiday weather
Average highs are around 21°C, so days are mild rather than hot. Sunshine averages 8h per day, so bright days are a strong part of the month. Rainfall averages 49mm, which is relatively low for holiday planning.
Monthly averages
Temp
21°C
Rain
49mm
Sun
8h
Sea
19°C
Weather score
52
Mixed
Mild
Average highs are around 21°C, so days are mild rather than hot.
Drier
Rainfall averages 49mm, which is relatively low for holiday planning.
Bright
Sunshine averages 8h per day, so bright days are a strong part of the month.
Cool sea
Sea temperatures average 19°C, so the water can feel cool.
Map
Compare Nambung National Park, Australia with nearby places by weather score, rain, sun, temperature, and swim conditions.
September21°C average high
September is on the cooler side of Nambung National Park's year, useful if you prefer less intense daytime heat.
Warmest monthsJanuary to March and December
This stretch sets the upper range for average daytime heat.
September49mm average rain
September sits near Nambung National Park's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to April and September to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
September8 hours average sun
September sits close to Nambung National Park's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsJanuary to February and November to December
This stretch has the strongest sunshine in the monthly averages.
September19°C average sea
September is one of the coolest sea months, so the water may feel fresher than in peak months.
Warmest seaJanuary to June
Sea temperatures are usually near 22°C in this stretch, so swimming comfort is at its strongest.
September52 weather score
September scores below Nambung National Park's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJanuary to March and December
These months have the strongest weather score in the monthly averages.