Japan weather in August
Japan in August averages 26°C (79°F), 98 mm of rain and 6.6 hours of sun a day.
Of the twelve months in Japan, August is the warmest and the fifth wettest.
- Average temp
- 26°C (79°F)
21–32°C · 69–89°F
- Rainfall
- 98 mm
Showers likely
- Sunshine
- 6.6 h
hours per day
What is Japan like in August?
Daytime
Days are warm, typically in the mid-20s°C or above.
Rain
Some rain is likely; pack for showers.
Evening
Evenings stay warm.
What should I pack for Japan in August?
High-factor sun cream
With daytime highs around 32°C, burn time is short even in shade.
Sunglasses and a brimmed hat
Midday glare is the part people underpack for, not the heat itself.
Loose cotton or linen
Synthetics stop working once you are sweating through them all day.
A refillable water bottle
Daily highs this warm need roughly double the water a temperate day does.
A light rain jacket
About 98 mm falls this month — showers rather than washouts.
A layer for the evening
The day swings about 11°C between its low and its high.
August compared with July and September
August in Japan is 1.5°C warmer than July and 32 mm drier than it, which averages 25°C (76°F).
August in Japan is 4.8°C warmer than September and 58 mm drier than it, which averages 21°C (71°F).
Daylight in Japan in August
On 15 August the sun is up for 13 hours 32 minutes in Japan, rising about 05:05 and setting about 18:37 local time.
August ends 1 hour shorter than it begins, so the last week of the month is a different length of day from the first.
That is 1 hour 5 minutes short of June, the longest-lit month here.
Japan weather by month
TemperatureRainfall
How August compares with the rest of the year
August is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | 0°C / 32°F | 45 mm |
| February | 1°C / 34°F | 35 mm |
| March | 5°C / 41°F | 83 mm |
| April | 11°C / 52°F | 78 mm |
| May | 17°C / 63°F | 92 mm |
| June | 21°C / 70°F | 114 mm |
| July | 25°C / 76°F | 130 mm |
| August | 26°C / 79°F | 98 mm |
| September | 21°C / 71°F | 156 mm |
| October | 14°C / 58°F | 128 mm |
| November | 8°C / 47°F | 56 mm |
| December | 3°C / 37°F | 32 mm |
Check another month
This is the month you are reading. Change either side to look at another.
FAQs about Japan in August
August climate averages for Japan, 1991–2020.
Japan averages 26°C (79°F) in August, ranging from about 21°C (69°F) at night to 32°C (89°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Some. About 98 mm falls across August, enough to need a light jacket but not enough to reshape a trip.
Yes. August averages 26°C (79°F) against 21°C (71°F) in September — 4.8°C warmer.
August is 1.5°C warmer than July, and 32 mm drier.
Yes. August falls inside the most comfortable stretch of the year here, May to October, on temperature and rainfall together.
About 6.6 hours of sun a day on the 1991–2020 average.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what August is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 13 hours 32 minutes of daylight in mid-August, against 14 hours 37 minutes in June and 9 hours 43 minutes in December.
On 15 August, sunrise is about 05:05 and sunset about 18:37 local time. Both shift across the month — the month ends 1 hour shorter than it starts.
