Cool
Average highs are around 20°C, so pack for cooler days.
September verdict
Niseko, Hokkaido, Japan in September
Weather score37Poor
Poor for holiday weather
Average highs are around 20°C, so pack for cooler days. Sunshine averages 5.3h per day, enough for a balanced month. Rainfall averages 151mm, so some wet days are possible.
September weather
Monthly averages
Temp
20°C
Rain
151mm
Sun
5.3h
Sea
22°C
Weather score
37
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 151mm, so some wet days are possible.
Some sun
Sunshine averages 5.3h per day, enough for a balanced month.
Cool sea
Sea temperatures average 22°C, so the water can feel cool.
Map
Weather map
Compare Niseko, Hokkaido, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September20°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
September151mm average rain
September is wetter than Niseko's yearly average, so flexible plans matter more.
Driest monthsMarch to June
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September5.3 hours average sun
September is brighter than Niseko's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsApril to June and September
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September22°C average sea
September is one of Niseko's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to September
Sea temperatures are usually near 19°C in this stretch, so swimming comfort is at its strongest.
Weather score
September37 weather score
September scores above Niseko's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
