Cool
Average highs are around 12°C, so pack for cooler days.
September verdict
Southwest National Park, Australia in September
Weather score14Poor
Poor for holiday weather
Average highs are around 12°C, so pack for cooler days. Sunshine averages 5.2h per day, enough for a balanced month. Rainfall averages 224mm, so showers are a real planning factor.
September weather
Monthly averages
Temp
12°C
Rain
224mm
Sun
5.2h
Sea
12°C
Weather score
14
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 224mm, so showers are a real planning factor.
Some sun
Sunshine averages 5.2h per day, enough for a balanced month.
Cool sea
Sea temperatures average 12°C, so the water can feel cool.
Map
Weather map
Compare Southwest National Park, Australia with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September12°C average high
September is on the cooler side of Southwest 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.
Rain
September224mm average rain
September is one of Southwest National Park's wettest months, so rain is likely to be a major planning factor.
Driest monthsJanuary to March
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September5.2 hours average sun
September sits close to Southwest National Park's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsJanuary to February and December
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September12°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
Sea temperatures are usually near 16°C in this stretch, so swimming comfort is at its strongest.
Weather score
September14 weather score
September scores below Southwest National Park's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJanuary to February
These months have the strongest weather score in the monthly averages.
