Osaka weather in August
Osaka in August averages 30°C (85°F), 113 mm of rain and 7.1 hours of sun a day.
Of the twelve months in Osaka, August is the warmest, the sixth wettest and the sunniest.
- Average temp
- 30°C (85°F)
26–34°C · 78–92°F
- Rainfall
- 113 mm
Showers likely
- Sunshine
- 7.1 h
hours per day
What is Osaka like in August?
Daytime
Days are hot, often above 32°C.
Rain
Some rain is likely; pack for showers.
Evening
Evenings stay warm.
What should I pack for Osaka in August?
High-factor sun cream
With daytime highs around 34°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 113 mm falls this month — showers rather than washouts.
August compared with July and September
August in Osaka is 1.7°C warmer than July and 62 mm drier than it, which averages 28°C (82°F).
August in Osaka is 3.9°C warmer than September and 32 mm drier than it, which averages 26°C (78°F).
Daylight in Osaka in August
On 15 August the sun is up for 13 hours 27 minutes in Osaka, rising about 05:18 and setting about 18:45 local time.
August ends 56 minutes shorter than it begins, so the last week of the month is a different length of day from the first.
That is 1 hour 1 minute short of June, the longest-lit month here.
Where to stay in Osaka
Dates are a starting point for August.
Travel guides for Osaka
What to read before you book.
Osaka 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 | 6°C / 44°F | 47 mm |
| February | 7°C / 44°F | 61 mm |
| March | 10°C / 50°F | 103 mm |
| April | 15°C / 60°F | 103 mm |
| May | 20°C / 69°F | 136 mm |
| June | 24°C / 76°F | 185 mm |
| July | 28°C / 82°F | 175 mm |
| August | 30°C / 85°F | 113 mm |
| September | 26°C / 78°F | 146 mm |
| October | 20°C / 68°F | 140 mm |
| November | 14°C / 57°F | 73 mm |
| December | 9°C / 48°F | 56 mm |
Similar weather in August
Other destinations whose August averages sit close to this one.
Check another month
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FAQs about Osaka in August
August climate averages for Osaka, 1991–2020.
Osaka averages 30°C (85°F) in August, ranging from about 26°C (78°F) at night to 34°C (92°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Some. About 113 mm falls across August, enough to need a light jacket but not enough to reshape a trip.
Yes. August averages 30°C (85°F) against 26°C (78°F) in September — 3.9°C warmer.
August is 1.7°C warmer than July, and 62 mm drier.
Yes. August falls inside the most comfortable stretch of the year here, May to October, on temperature and rainfall together.
About 7.1 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 27 minutes of daylight in mid-August, against 14 hours 28 minutes in June and 9 hours 51 minutes in December.
On 15 August, sunrise is about 05:18 and sunset about 18:45 local time. Both shift across the month — the month ends 56 minutes shorter than it starts.
