Mild
Average highs are around 25°C, so days are mild rather than hot.
September verdict
Sendai, Miyagi, Japan in September
Weather score48Mixed
Mixed for holiday weather
Average highs are around 25°C, so days are mild rather than hot. Sunshine averages 4.2h per day, so this is not one of the brighter months. Rainfall averages 174mm, so some wet days are possible.
September weather
Monthly averages
Temp
25°C
Rain
174mm
Sun
4.2h
Sea
23°C
Weather score
48
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 174mm, so some wet days are possible.
Limited sun
Sunshine averages 4.2h per day, so this is not one of the brighter months.
Swimmable
Sea temperatures average 23°C, which can work for swimming but may feel fresh.
Map
Weather map
Compare Sendai, Miyagi, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September25°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
September174mm average rain
September is one of Sendai's wettest months, so rain is likely to be a major planning factor.
Driest monthsJanuary to March and November to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September4.2 hours average sun
September is one of Sendai's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsApril to May
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September23°C average sea
September is one of Sendai's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to September
Sea temperatures are usually near 21°C in this stretch, so swimming comfort is at its strongest.
Weather score
September48 weather score
September scores above Sendai'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.
