Osaka, Japan — Weather in August 2026

Climate Overview

Osaka, Japan in August has hot conditions, with highs reaching 32.2°C (90°F) and afternoons the warmest part of the day. Rain falls on about 12 days this month. Sea temperature reaches 30.1°C (86°F).

This month falls at the end of Summer. Temperatures are at their seasonal peak.

Temperatures remain fairly steady throughout August, with daily highs around 32°C (90°F).

Rainfall is heaviest during the middle of the month, while the first third tends to be drier.

Expect around 11.6h of sunshine at the start of August, decreasing to 10.1h by the end.

The warmest days tend to fall around the 4th, averaging 33.4°C (92°F).

Compared to July, this month is about 2°C warmer with 3 fewer rainy days. Temperatures begin dropping heading into September.

Monthly August Averages

Temperature

32°C / 25°C

Feels Like

37°C / 30°C

Rain

12 days · 163 mm

Sunshine

10.4h / day

Humidity

76% — Muggy

Wind

14 km/h

Wind Direction

SW (219°)

Gusts

34 km/h

Daylight

13.4 h

Cloud Cover

59%

Clear Sky Days

3.6

UV Index

7.3 — Very High

Sea Temperature

30°C

Dew Point

24°C — Oppressive

Moon Phase

Waxing Crescent · 3%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

HighLow

Daily Precipitation

Rainfall

Daily Sunshine

Sunshine

Daily Wind Speed

Wind Speed

Sun Position

Sunrise 05:19

Daylight 13.5h

Sunset 18:49

What to Expect

With midday temperatures reaching 32°C (90°F), schedule outdoor activities for early morning or late afternoon. Evenings remain warm enough for comfortable outdoor dining and night markets. Keep afternoons flexible as tropical showers are common — they typically clear within an hour.

Rain most often builds later in the day, so mornings are typically the driest window and afternoon showers are more likely.

1 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January	9°C / 2°C	5°C / -2°C	6days (49 mm) Good	7.6h Good	74% Muggy	3.3 Moderate	Poor	View Details
February	10°C / 2°C	6°C / -1°C	7days (60 mm) Good	7.9h Good	72% Muggy	4.1 Moderate	Poor	View Details
March	14°C / 5°C	12°C / 3°C	10days (103 mm) Wet	8.4h Good	72% Muggy	4.9 Moderate	Fair	View Details
April	19°C / 10°C	18°C / 9°C	10days (138 mm) Wet	8.9h Good	72% Muggy	6 High	Good	View Details
May best	23°C / 15°C	24°C / 15°C	10days (164 mm) Wet	9.1h Good	73% Muggy	6.1 High	Excellent	View Details
June best	27°C / 20°C	29°C / 22°C	13days (215 mm) Wet	8.7h Good	78% Humid	6.5 High	Excellent	View Details
July	31°C / 24°C	35°C / 29°C	15days (222 mm) Wet	9.3h Good	80% Humid	7.6 Very High	Wet	View Details
August	32°C / 25°C	37°C / 30°C	12days (163 mm) Wet	10.4h Excellent	76% Humid	7.3 Very High	Poor	View Details
September	29°C / 22°C	32°C / 25°C	13days (170 mm) Wet	8.4h Good	78% Humid	6.4 High	Good	View Details
October best	22°C / 15°C	23°C / 15°C	11days (171 mm) Wet	7.7h Good	77% Humid	4.7 Moderate	Excellent	View Details
November best	17°C / 9°C	15°C / 7°C	7days (63 mm) Good	7.8h Good	76% Humid	3.6 Moderate	Good	View Details
December	11°C / 4°C	8°C / 1°C	6days (47 mm) Good	7.4h Good	75% Muggy	3.1 Moderate	Fair	View Details

What to Wear

Light, breathable fabrics like cotton and linen are essential. Opt for loose-fitting clothing in light colors to stay cool.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

UmbrellaWaterproof jacketBreathable clothingSunscreen (SPF 30+)Sun hatSunglassesComfortable walking shoes

Frequently Asked Questions

Expand all

Is August a good time to visit Osaka?

August is typically poor for visiting Osaka, with average highs of 32°C (90°F) and around 12 rainy days. Osaka, Japan in August has hot conditions, with highs reaching 32.2°C (90°F) and afternoons the warmest part of the day.

Does it rain a lot in Osaka in August?

Osaka typically sees around 12 rainy days in August with 163 mm (6.4 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Osaka in August?

Nights stay pleasantly warm in Osaka during August, around 25°C (77°F). Light evening wear is sufficient.

What should I pack for Osaka in August?

With highs of 32°C (90°F) and lows of 25°C (77°F) in August, we recommend: Umbrella, Waterproof jacket, Breathable clothing, Sunscreen (SPF 30+), Sun hat. Comfortable walking shoes are essential.

Is August among the best months weather-wise in Osaka?

August is not the most favourable month weather-wise in Osaka. Consider visiting during months with milder temperatures or less rainfall for a better experience.

What is the UV index in Osaka in August?

The average UV index in Osaka during August is 7 (high). Wear sunscreen SPF 30+, a hat, and sunglasses. Limit direct sun exposure between 10 AM and 4 PM.

How many hours of daylight are there in Osaka in August?

Osaka gets approximately 13 hours of daylight per day in August, with around 10 hours of sunshine.

Does it snow in Osaka in August?

Snow is uncommon in Osaka during August based on 10-year climate averages.

Last updated: