Osaka, Japan — Weather in May 2027

Climate Overview

Osaka, Japan in May has warm conditions, with highs averaging 23.1°C (74°F). Rain falls on about 10 days this month. Sea temperature stays cool at 19.3°C (67°F).

This month falls at the end of Spring.

Daily highs in May gradually rise from around 22°C (71°F) at the start to 24°C (76°F) by month's end.

May sees fairly even rainfall, totalling about 165 mm across the month.

Expect around 10.1h of sunshine at the start of May, decreasing to 8.6h by the end.

The warmest days tend to fall around the 24th, averaging 24.6°C (76°F).

Compared to April, this month is about 4°C warmer with 0 fewer rainy days. Temperatures will rise further into June.

Monthly May Averages

Temperature

23°C / 15°C

Feels Like

24°C / 15°C

Rain

10 days · 164 mm

Sunshine

9.1h / day

Humidity

73% — Humid

Wind

14 km/h

Wind Direction

WSW (256°)

Gusts

34 km/h

Daylight

14 h

Cloud Cover

66%

Clear Sky Days

3.7

UV Index

6.1 — High

Sea Temperature

19°C

Dew Point

14°C — Comfortable

Moon Phase

Waxing Gibbous · 66%

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 04:57

Daylight 14h

Sunset 18:54

What to Expect

Daytime temperatures around 23°C (74°F) are ideal for full-day outdoor exploration.

Rain usually comes in shorter passing showers rather than all-day rain.

Recent yearly records for May have stayed close to the 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

Dress in layers — a mix of long sleeves, light sweaters, and a versatile jacket works best for changeable conditions.

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

Packing List

UmbrellaWaterproof jacketSunscreen (SPF 30+)SunglassesComfortable walking shoes

Frequently Asked Questions

Expand all

Is May a good time to visit Osaka?

May is typically excellent for visiting Osaka, with average highs of 23°C (74°F) and around 10 rainy days. Osaka, Japan in May has warm conditions, with highs averaging 23.1°C (74°F). Rain falls on about 10 days this month. Sea

Does it rain a lot in Osaka in May?

Osaka typically sees around 10 rainy days in May with 164 mm (6.5 in) of total rainfall. An umbrella should suffice.

Does it get cold at night in Osaka in May?

Evenings in Osaka during May are mild at 15°C (59°F). A light cardigan is usually enough.

What should I pack for Osaka in May?

With highs of 23°C (74°F) and lows of 15°C (59°F) in May, we recommend: Umbrella, Waterproof jacket, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. Comfortable walking shoes are essential.

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

Yes, May offers some of the best weather conditions in Osaka with comfortable temperatures and lower chances of rain.

What is the UV index in Osaka in May?

The average UV index in Osaka during May is 6 (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 May?

Osaka gets approximately 14 hours of daylight per day in May, with around 9 hours of sunshine.

Does it snow in Osaka in May?

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

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