Mild
Average highs are around 26°C, so days are mild rather than hot.
September verdict
Japan in September
Weather score51Mixed
Mixed for holiday weather
Average highs are around 26°C, so days are mild rather than hot. Sunshine averages 4.7h per day, so this is not one of the brighter months. Rainfall averages 213mm, so showers are a real planning factor.
September weather
Monthly averages
Temp
26°C
Rain
213mm
Sun
4.7h
Sea
21°C
Weather score
51
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 213mm, so showers are a real planning factor.
Limited sun
Sunshine averages 4.7h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 21°C, so the water can feel cool.
Map
Weather map
Compare Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September26°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
September213mm average rain
September is wetter than Japan's yearly average, so flexible plans matter more.
Driest monthsJanuary to March
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September4.7 hours average sun
September sits close to Japan's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsApril to May and July to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September21°C average sea
September is one of Japan's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to September
Sea temperatures are usually near 20°C in this stretch, so swimming comfort is at its strongest.
Weather score
September51 weather score
September scores above Japan's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsJuly to September
These months have the strongest weather score in the monthly averages.
Hotels near Japan
Marriott
Lake Biwa Marriott HotelShiga, Japan
The Prince Kyoto Takaragaike, Autograph CollectionKyoto City, Japan
Hotel Koo Otsu Hyakucho, a Member of Design Hotels™Otsu, Shiga, Japan
The Westin Miyako KyotoKyoto, Kyoto, Japan
The Ritz-Carlton, KyotoKyoto, Japan
The Chapter Kyoto, a Tribute Portfolio HotelKyoto-City, Kyoto, Japan