Cool
Average highs are around 16°C, so pack for cooler days.
December verdict
Stewart Island, New Zealand in December
Weather score26Poor
Poor for holiday weather
Average highs are around 16°C, so pack for cooler days. Sunshine averages 5.4h per day, enough for a balanced month. Rainfall averages 99mm, so some wet days are possible.
December weather
Monthly averages
Temp
16°C
Rain
99mm
Sun
5.4h
Sea
13°C
Weather score
26
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 99mm, so some wet days are possible.
Some sun
Sunshine averages 5.4h per day, enough for a balanced month.
Cool sea
Sea temperatures average 13°C, so the water can feel cool.
Map
Weather map
Compare Stewart Island, New Zealand with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December16°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
December99mm average rain
December sits near Stewart Island's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsFebruary to March and June to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December5.4 hours average sun
December is one of Stewart Island's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsJanuary to February and October to December
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
December13°C average sea
December is close to Stewart Island's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaJanuary to April and December
Sea temperatures are usually near 14°C in this stretch, so swimming comfort is at its strongest.
Weather score
December26 weather score
December scores above Stewart Island's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsJanuary to March and November to December
These months have the strongest weather score in the monthly averages.