What is the weather like in Osaka in September?

Expect temperatures between 21°C and 29°C with 32% average rain probability and about 8 hours of sunshine daily.

What is the weather like in Osaka in September?

Osaka in September scores 53/100 based on 30 years of climate data. Good option with minor considerations.

Who should visit Osaka in September?

September in Osaka is ideal for: Beach lovers, Cultural tourists, Business travelers.

Osaka Weather in September | 30-Year Forecast

Avg High

29°C

Hottest around day 1

Avg Low

21°C

Coolest around day 30

Rainy Days

30days

32% avg rain chance

Sunshine

8hrs/day

Autumn season

Sea Temperature in September

Osaka Bay(大阪湾)

28.9°C

Monthly Average

Water Feel

🌴Tropical

Perfect for swimming and water sports

Swim Rating

✅Excellent for swimming

Based on average sea surface temperature

Body of Water

Osaka Bay

大阪湾

Osaka coastline

Essential Travel Info for Osaka

🗓️ Best Time to Visit 📖 Travel Guide 🍴 Food Guide

Currency

JPY

¥ Japanese yen

Language

Japanese

Driving

Left side

Safety

Very High Safety

GPI: 1.336

Travel Intelligence

Exclusive flight analytics & health data for Osaka

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Moderate

58/ 100

Traffic Index

Balanced traffic

Peak Daily Arrivals

slots per day

Peak

Nov

Low

May

Monthly Traffic Distribution

242

Jan

253

Feb

258

Mar

238

Apr

238

May

270

Jun

273

Jul

275

Aug

263

Sep

263

Oct

280

Nov

254

Dec

Traffic Level

Low Season

Key Connections

Seoul Incheon (ICN)

Taipei Taiwan Taoyuan (TPE)

Shanghai Pudong (PVG)

Hong Kong Chek Lap Kok (HKG)

Naha (OKA)

Health & Safety Advisory

CDC travel health recommendations

8 Recommendations

COVID-19

All eligible travelers should be up to date with their COVID-19 vaccines. Please seeYour COVID-19 Vaccinationfor more information.

Hepatitis A

Consider hepatitis A vaccination for most travelers. It is recommended for travelers who will be doing higher risk activities, such as visiting smaller cities, villages, or rural areas where a traveler might get infected through food or water. It is recommended for travelers who plan on eating street food.

Hepatitis B

Recommended for unvaccinated travelers younger than 60 years old traveling to Japan. Unvaccinated travelers 60 years and older may get vaccinated before traveling to Japan.

Japanese Encephalitis

Recommended for travelers whoAre moving to an area with Japanese encephalitis to liveSpend long periods of time, such as a month or more, in areas with Japanese encephalitisFrequently travel to areas with Japanese encephalitisConsider vaccination for travelersSpending less than a month in areas with Japanese encephalitis but will be doing activities that increase risk of infection, such as visiting rural areas, hiking or camping, or staying in places without air conditioning, screens, or bed netsGoing to areas with Japanese encephalitis who are uncertain of their activities or how long they will be thereNot recommended for travelers planning short-term travel to urban areas or travel to areas with no clear Japanese encephalitis season.

Measles

Cases of measles are on the rise worldwide. Travelers are at risk of measles if they have not been fully vaccinated at least two weeks prior to departure, or have not had measles in the past, and travel internationally to areas where measles is spreading.All international travelers should be fully vaccinated against measles with the measles-mumps-rubella (MMR) vaccine, including an early dose for infants 6–11 months, according toCDC’s measles vaccination recommendations for international travel.

Rabies

Dogs infected with rabies are not commonly found in Japan.If rabies exposures occur while in Japan, rabies vaccines are typically available throughout most of the country.Rabies pre-exposure vaccination considerations include whether travelers 1) will be performing occupational or recreational activities that increase risk for exposure to potentially rabid animals and 2) might have difficulty getting prompt access to safe post-exposure prophylaxis.Please consult with a healthcare provider to determine whether you should receive pre-exposure vaccination before travel.For more information, seecountry rabies status assessments.

+2 more

Source: CDC Travelers' Health

View Complete Health Guide

Is September a Good Time to Visit Osaka?

👌Good option with minor considerations(53/100)

Short Answer

September brings storm season risk to Osaka. While typical weather is 29°C with 32% rain, plan for potential disruptions and secure cancellation-friendly bookings.

Decision Factors

Typhoon season active

Western Pacific zone - expect potential typhoon activity

Oppressive heat and humidity

28.5°C with 76% humidity - challenging conditions

Vaccinations required

Yellow Fever

Warm tropical seas

28.9°C sea temperature - Tropical Bath

Seismically active region

9 earthquakes recorded in this month (30-year data)

Peak tourist season

94% of annual peak - expect crowds and peak prices

Good For

🏖️
Beach lovers
28.9°C warm seas and 32% rain probability
🏛️
Cultural tourists
Comfortable conditions for exploring museums and sites
💼
Business travelers
Climate-controlled meetings unaffected by weather

Who Should Avoid

💰
Budget travelers
Peak season means premium prices everywhere
👴
Elderly travelers
76% humidity creates difficult conditions
💼
Business travelers
Storm season may cause flight disruptions
🌡️
Heat-sensitive visitors
33°C feels-like temperature creates discomfort

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Osaka in September averages 29°C with 32% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: Osaka in September

What are the temperatures in Osaka in September?

Daytime highs average 29°C, nights drop to 21°C. Temperatures remain fairly consistent.

How many rainy days in Osaka in September?

Expect around 30 days with measurable rainfall. An umbrella is advisable.

What to wear in Osaka in September?

Light, breathable fabrics. Don't forget sunglasses and a hat.

Is September peak season in Osaka?

This is shoulder season—moderate prices and manageable crowds.

Osaka Weather in September