Cool
Average highs are around 17°C, so pack for cooler days.
December verdict
Southwest National Park, Australia in December
Weather score30Poor
Poor for holiday weather
Average highs are around 17°C, so pack for cooler days. Sunshine averages 7.4h per day, enough for a balanced month. Rainfall averages 173mm, so some wet days are possible.
December weather
Monthly averages
Temp
17°C
Rain
173mm
Sun
7.4h
Sea
14°C
Weather score
30
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 173mm, so some wet days are possible.
Some sun
Sunshine averages 7.4h per day, enough for a balanced month.
Cool sea
Sea temperatures average 14°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
December17°C average high
December sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJanuary to March and December
This stretch sets the upper range for average daytime heat.
Rain
December173mm average rain
December sits near Southwest National Park's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to March
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December7.4 hours average sun
December is brighter than Southwest National Park's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsJanuary to February and December
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
December14°C average sea
December is close to Southwest National Park's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaJanuary to April
Sea temperatures are usually near 16°C in this stretch, so swimming comfort is at its strongest.
Weather score
December30 weather score
December sits close to Southwest National Park's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJanuary to February
These months have the strongest weather score in the monthly averages.
