Cool
Average highs are around 15°C, so pack for cooler days.
September verdict
Whanganui, New Zealand in September
Weather score24Poor
Poor for holiday weather
Average highs are around 15°C, so pack for cooler days. Sunshine averages 4.8h per day, so this is not one of the brighter months. Rainfall averages 82mm, so some wet days are possible.
September weather
Monthly averages
Temp
15°C
Rain
82mm
Sun
4.8h
Sea
13°C
Weather score
24
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 82mm, so some wet days are possible.
Limited sun
Sunshine averages 4.8h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 13°C, so the water can feel cool.
Map
Weather map
Compare Whanganui, New Zealand with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September15°C average high
September is on the cooler side of Whanganui'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
September82mm average rain
September sits near Whanganui's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to May and August to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September4.8 hours average sun
September is below Whanganui's yearly sunshine average, so bright-day planning is less reliable than in peak months.
Brightest monthsJanuary to February and November to December
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September13°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 18°C in this stretch, so swimming comfort is at its strongest.
Weather score
September24 weather score
September scores below Whanganui's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJanuary to March
These months have the strongest weather score in the monthly averages.