Warm
Average highs sit around 29°C, giving warm days by monthly-average standards.
Weather Guide
Japan Average Monthly Weather
Weather score38Poor annual avg
Best months: August, July, September
Across the year, average daytime temperatures are around 19°C, sunshine averages 4.9h per day, and rainfall totals about 1441mm. Sea temperatures average 16°C across the year.
Annual weather
Annual averages
Temp
19°C
Rain
1441mm
Annual total
Sun
4.9h
Sea
16°C
Weather score
38
Poor avg
Seasonal climate calendar
Trip feel
Wet
Rainfall averages 184mm, so showers are a real planning factor.
Some sun
Sunshine averages 5.8h per day, enough for a balanced month.
Cool sea
Sea temperatures average 22°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
August29°C average high
August is one of Japan's warmest months, with daytime heat above the yearly average.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
August184mm average rain
August 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
August5.8 hours average sun
August is one of Japan's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsApril to May and July to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
August22°C average sea
August 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
August57 weather score
August is one of Japan's best weather-score months, combining the strongest overall balance in the yearly averages.
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