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Best time to visit Japan

In Tokyo: April to June and September to October — the months averaging 18–27 °C by day. No other month of the twelve falls inside that band in Tokyo.

Japan is not one climate. Each reference city below is answered on its own numbers.

Tokyo

  1. January: 8 °C by day, 0 °C at night, 62 mm of rain
  2. February: 9 °C by day, 0 °C at night, 63 mm of rain
  3. March: 13 °C by day, 4 °C at night, 117 mm of rain
  4. April: 18 °C by day, 9 °C at night, 123 mm of rain, recommended
  5. May: 22 °C by day, 14 °C at night, 140 mm of rain, recommended
  6. June: 25 °C by day, 18 °C at night, 167 mm of rain, recommended
  7. July: 29 °C by day, 22 °C at night, 158 mm of rain
  8. August: 30 °C by day, 24 °C at night, 115 mm of rain
  9. September: 26 °C by day, 20 °C at night, 182 mm of rain, recommended
  10. October: 21 °C by day, 14 °C at night, 193 mm of rain, recommended
  11. November: 16 °C by day, 8 °C at night, 93 mm of rain
  12. December: 11 °C by day, 2 °C at night, 62 mm of rain
Warmest
August, 30 °C
Coolest
January, 8 °C
Driest
January, 62 mm
Wettest
October, 193 mm

Sapporo

June to September — 18–27 °C by day. No other month of the twelve falls inside that band in Sapporo.

  1. January: -3 °C by day, -10 °C at night, 58 mm of rain
  2. February: -2 °C by day, -9 °C at night, 52 mm of rain
  3. March: 2 °C by day, -6 °C at night, 68 mm of rain
  4. April: 10 °C by day, 0 °C at night, 75 mm of rain
  5. May: 16 °C by day, 7 °C at night, 98 mm of rain
  6. June: 20 °C by day, 12 °C at night, 95 mm of rain, recommended
  7. July: 24 °C by day, 17 °C at night, 140 mm of rain, recommended
  8. August: 25 °C by day, 18 °C at night, 186 mm of rain, recommended
  9. September: 21 °C by day, 14 °C at night, 147 mm of rain, recommended
  10. October: 15 °C by day, 7 °C at night, 107 mm of rain
  11. November: 7 °C by day, 1 °C at night, 96 mm of rain
  12. December: 0 °C by day, -6 °C at night, 73 mm of rain
Warmest
August, 25 °C
Coolest
January, -3 °C
Driest
February, 52 mm
Wettest
August, 186 mm

Naha (Okinawa)

November to March — 18–27 °C by day. 8 of the twelve months clear that band in Naha (Okinawa), so this is the driest run of 5 in a row.

  1. January: 19 °C by day, 16 °C at night, 96 mm of rain, recommended
  2. February: 19 °C by day, 16 °C at night, 97 mm of rain, recommended
  3. March: 21 °C by day, 18 °C at night, 128 mm of rain, recommended
  4. April: 23 °C by day, 20 °C at night, 147 mm of rain
  5. May: 25 °C by day, 23 °C at night, 232 mm of rain
  6. June: 28 °C by day, 25 °C at night, 249 mm of rain
  7. July: 29 °C by day, 27 °C at night, 140 mm of rain
  8. August: 29 °C by day, 27 °C at night, 194 mm of rain
  9. September: 29 °C by day, 26 °C at night, 205 mm of rain
  10. October: 27 °C by day, 24 °C at night, 144 mm of rain
  11. November: 24 °C by day, 22 °C at night, 113 mm of rain, recommended
  12. December: 20 °C by day, 18 °C at night, 120 mm of rain, recommended
Warmest
July, 29 °C
Coolest
January, 19 °C
Driest
January, 96 mm
Wettest
June, 249 mm

How this is worked out: a month qualifies when its mean daytime high falls between 18 °C and 27 °C. Where more than five qualify, the answer is the driest run of consecutive qualifying months; where none do, it is the driest three months in a row if the year is hot throughout, or the warmest three if it never gets there. The figures are the thirty-year monthly averages charted below, and they are averages, not a forecast — any single year can miss them by a wide margin.

Tokyo

Long-term averages for Tokyo: the mean daily high, the mean overnight low and the mean monthly rainfall across 30 years of ERA5 reanalysis data (1995–2024).

DayNight
051015202530°C0200mmJanFebMarAprMayJunJulAugSepOctNovDecJanuary: Day 8 °C, Night 0 °C, Rain 62 mm. February: Day 9 °C, Night 0 °C, Rain 63 mm. March: Day 13 °C, Night 4 °C, Rain 117 mm. April: Day 18 °C, Night 9 °C, Rain 123 mm. May: Day 22 °C, Night 14 °C, Rain 140 mm. June: Day 25 °C, Night 18 °C, Rain 167 mm. July: Day 29 °C, Night 22 °C, Rain 158 mm. August: Day 30 °C, Night 24 °C, Rain 115 mm. September: Day 26 °C, Night 20 °C, Rain 182 mm. October: Day 21 °C, Night 14 °C, Rain 193 mm. November: Day 16 °C, Night 8 °C, Rain 93 mm. December: Day 11 °C, Night 2 °C, Rain 62 mm
Show the monthly table
Tokyo
MonthDay (°C)Night (°C)Rain (mm)
January8062
February9063
March134117
April189123
May2214140
June2518167
July2922158
August3024115
September2620182
October2114193
November16893
December11262

Sapporo

Long-term averages for Sapporo: the mean daily high, the mean overnight low and the mean monthly rainfall across 30 years of ERA5 reanalysis data (1995–2024).

DayNight
-1001020°C0200mmJanFebMarAprMayJunJulAugSepOctNovDecJanuary: Day -3 °C, Night -10 °C, Rain 58 mm. February: Day -2 °C, Night -9 °C, Rain 52 mm. March: Day 2 °C, Night -6 °C, Rain 68 mm. April: Day 10 °C, Night 0 °C, Rain 75 mm. May: Day 16 °C, Night 7 °C, Rain 98 mm. June: Day 20 °C, Night 12 °C, Rain 95 mm. July: Day 24 °C, Night 17 °C, Rain 140 mm. August: Day 25 °C, Night 18 °C, Rain 186 mm. September: Day 21 °C, Night 14 °C, Rain 147 mm. October: Day 15 °C, Night 7 °C, Rain 107 mm. November: Day 7 °C, Night 1 °C, Rain 96 mm. December: Day 0 °C, Night -6 °C, Rain 73 mm
Show the monthly table
Sapporo
MonthDay (°C)Night (°C)Rain (mm)
January-3-1058
February-2-952
March2-668
April10075
May16798
June201295
July2417140
August2518186
September2114147
October157107
November7196
December0-673

Naha (Okinawa)

Long-term averages for Naha (Okinawa): the mean daily high, the mean overnight low and the mean monthly rainfall across 30 years of ERA5 reanalysis data (1995–2024).

DayNight
15202530°C0250mmJanFebMarAprMayJunJulAugSepOctNovDecJanuary: Day 19 °C, Night 16 °C, Rain 96 mm. February: Day 19 °C, Night 16 °C, Rain 97 mm. March: Day 21 °C, Night 18 °C, Rain 128 mm. April: Day 23 °C, Night 20 °C, Rain 147 mm. May: Day 25 °C, Night 23 °C, Rain 232 mm. June: Day 28 °C, Night 25 °C, Rain 249 mm. July: Day 29 °C, Night 27 °C, Rain 140 mm. August: Day 29 °C, Night 27 °C, Rain 194 mm. September: Day 29 °C, Night 26 °C, Rain 205 mm. October: Day 27 °C, Night 24 °C, Rain 144 mm. November: Day 24 °C, Night 22 °C, Rain 113 mm. December: Day 20 °C, Night 18 °C, Rain 120 mm
Show the monthly table
Naha (Okinawa)
MonthDay (°C)Night (°C)Rain (mm)
January191696
February191697
March2118128
April2320147
May2523232
June2825249
July2927140
August2927194
September2926205
October2724144
November2422113
December2018120

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