Where to Go for Great Weather
Japan · Month guide

Japan in August

Around 28 °C with 212 mm of rain and 5.6 hours of sun a day.

August is a mixed month for Japan — worth planning around specific regions. Around 28 °C with 212 mm of rain and 5.6 hours of sun a day. Use the regional grid below to find where this month works best — national averages hide the swings between coast, highlands, and inland.

Plan a trip in August← Japan year-round
Match verdictMatch: Acceptable. Japan · August.
Acceptable
Japan · August
What the weather usually does

Japan · typical month

  • Day / night
    22 – 28 °C
    Year range -2 – 28 °C
  • Rainfall
    212 mm
    Year range 91 – 223 mm
  • Sunshine
    5.6 hr / day
    Year range 5.2 – 7.5 hr / day
Compare with another destination
What’s open · August

Things to do in Japan in August

August closes 1 thing below; the rest run as normal.

  • Closed
    Skiing in Hokkaido

    Hokkaido's summers are cool and dry rather than hot and humid, which is a different reason to go and not a skiing one

    Sources: adventure-life.com, kimkim.com

  • At its best
    Climbing Mount Fuji

    the official climbing season: trails, mountain huts and transport all open. The Yoshida and Subashiri trails usually open 1 July, Fujinomiya and Gotemba around 10 July

    Sources: japan-guide.com, fujisan-climb.jp

Opening seasons are checked by hand against the operators and parks themselves, not derived from the climate figures on this page. Last reviewed 2026-08-28. Dates move — confirm before you book.

47 regions · current month

Japan, taken apart

Safety · 6 governments

What the governments say about Japan

Combined advisory · most-cautious-wins
Exercise normal precautions
Highest level across 6 governments · Advisory last changed
See breakdown by country
AU

Exercise normal precautions

Changed Checked www.smartraveller.gov.au
CA

Exercise normal precautions

Changed Checked travel.gc.ca
DE

Exercise normal precautions

Changed Checked www.auswaertiges-amt.de
UK

Exercise normal precautions

Changed Checked www.gov.uk
US

Exercise normal precautions

Changed Checked travel.state.gov

Parts of Japan carry a higher advisory — up to level 4, "Do not travel". The governments concerned name a region rather than a boundary, so the carve-out is not drawn on the map and is not reflected in the combined level above. Follow the source links for where it applies.

Climate at a glance · 10-year ERA5

A decade of weather, in one page

Temperature°C
Temperature · 12-month climatologyJapan. Average daytime high by month in °C. Lowest in January (4.0), highest in August (28.0). Monthly means: 4.0, 4.9, 9.6, 14.8, 19.6, 22.7, 26.8, 28.0, 24.7, 18.6, 12.7, 6.3.
— daytime high— overnight low▬ typical range
View data table
MonthAverage daytime high (°C)Average overnight low (°C)Typical lowTypical high
January4.0-2.3-6.07.8
February4.9-1.8-5.110.7
March9.62.3-2.115.0
April14.87.22.619.6
May19.612.17.523.4
June22.716.512.426.9
July26.821.118.130.5
August28.022.019.030.5
September24.718.514.328.6
October18.611.97.123.6
November12.75.60.917.7
December6.30.0-3.711.6
Rainfallmm
Rainfall · 12-month climatologyJapan. Rainfall by month in mm. Lowest in February (91), highest in July (223). Monthly means: 93, 91, 124, 135, 153, 208, 223, 212, 194, 162, 105, 103.
View data table
MonthRainfall (mm)
January93
February91
March124
April135
May153
June208
July223
August212
September194
October162
November105
December103
Sunshinehr / day
Sunshine · 12-month climatologyJapan. Sunshine hours by month in hr / day. Lowest in July (5.2), highest in February (7.5). Monthly means: 7.0, 7.5, 7.4, 7.0, 6.5, 5.3, 5.2, 5.6, 5.5, 6.0, 6.6, 6.6.
View data table
MonthSunshine hours (hr / day)
January7.0
February7.5
March7.4
April7.0
May6.5
June5.3
July5.2
August5.6
September5.5
October6.0
November6.6
December6.6
Windkm/h
Wind · 12-month climatologyJapan. Average wind speed by month in km/h. Lowest in July (8.3), highest in February (12.1). Monthly means: 11.8, 12.1, 11.4, 11.2, 10.0, 8.9, 8.3, 8.9, 9.2, 10.2, 10.8, 11.9.
— average▬ typical range
View data table
MonthAverage wind speed (km/h)Typical lowTypical high
January11.87.817.8
February12.17.717.7
March11.47.716.2
April11.27.515.9
May10.06.914.4
June8.96.213.1
July8.36.111.7
August8.95.613.9
September9.26.214.2
October10.26.615.3
November10.87.316.0
December11.97.318.3
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← Earlier
July

Around 27 °C with 223 mm of rain and 5.2 hours of sun a day.

Later →
September

Around 25 °C with 194 mm of rain and 5.5 hours of sun a day.

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