Mild
Average highs are around 22°C, so days are mild rather than hot.
September verdict
Hakodate, Hokkaido, Japan in September
Weather score43Mixed
Mixed for holiday weather
Average highs are around 22°C, so days are mild rather than hot. Sunshine averages 5.2h per day, enough for a balanced month. Rainfall averages 171mm, so some wet days are possible.
September weather
Monthly averages
Temp
22°C
Rain
171mm
Sun
5.2h
Sea
23°C
Weather score
43
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 171mm, so some wet days are possible.
Some sun
Sunshine averages 5.2h per day, enough for a balanced month.
Swimmable
Sea temperatures average 23°C, which can work for swimming but may feel fresh.
Map
Weather map
Compare Hakodate, Hokkaido, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September22°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
September171mm average rain
September is one of Hakodate's wettest months, so rain is likely to be a major planning factor.
Driest monthsJanuary to June and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September5.2 hours average sun
September is brighter than Hakodate's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsApril to June
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September23°C average sea
September is one of Hakodate's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to October
Sea temperatures are usually near 19°C in this stretch, so swimming comfort is at its strongest.
Weather score
September43 weather score
September scores above Hakodate'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.
