30YearWeather
Nagasaki in September
Nagasaki weather in September - Japan
😊Warm & Pleasant

Nagasaki Weather in September

Plan your September trip to Nagasaki, Japan. Based on 30 years of NASA data, expect temperatures of 28°C (high) to 23°C (low), with 34% rain probability and 8 hours of daily sunshine. The Coastal Waters averages 29°C in September. Pack rain gear for around 29 rainy days.

Avg High
28°C

Hottest around day 1

Avg Low
23°C

Coolest around day 30

Rainy Days
29days

34% avg rain chance

Sunshine
8hrs/day

Autumn season

Sea Temperature in September

Coastal Waters(Ocean)

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
Coastal Waters

Ocean

Nagasaki coastline

Nagasaki September Weather Calendar

Click any day to see detailed weather information

Day 1
rain
Rainy
29°C43%
Day 2
cloudy
Cloudy
29°C39%
Day 3
cloudy
Cloudy
29°C36%
Day 4
cloudy
Cloudy
29°C34%
Day 5
cloudy
Cloudy
29°C35%
Day 6
cloudy
Cloudy
29°C33%
Day 7
cloudy
Cloudy
29°C32%
Day 8
cloudy
Cloudy
29°C34%
Day 9
cloudy
Cloudy
29°C33%
Day 10
cloudy
Cloudy
29°C33%
Day 11
cloudy
Cloudy
29°C35%
Day 12
cloudy
Cloudy
29°C37%
Day 13
cloudy
Cloudy
29°C37%
Day 14
cloudy
Cloudy
29°C38%
Day 15
rain
Rainy
28°C42%
Day 16
rain
Rainy
28°C43%
Day 17
rain
Rainy
28°C41%
Day 18
cloudy
Cloudy
28°C39%
Day 19
cloudy
Cloudy
27°C36%
Day 20
cloudy
Cloudy
27°C32%
Day 21
cloudy
Cloudy
27°C30%
Day 22
cloudy
Cloudy
27°C30%
Day 23
cloudy
Cloudy
26°C27%
Day 24
cloudy
Cloudy
26°C30%
Day 25
cloudy
Cloudy
27°C27%
Day 26
cloudy
Cloudy
27°C24%
Day 27
cloudy
Cloudy
27°C26%
Day 28
cloudy
Cloudy
26°C31%
Day 29
cloudy
Cloudy
26°C32%
Day 30
cloudy
Cloudy
26°C30%

Essential Travel Info for Nagasaki

🗓️ 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 Nagasaki

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Remote
19/ 100
Traffic Index

Off the beaten path

Peak Daily Arrivals

0

slots per day

Peak

Feb

Low

Jul

Monthly Traffic Distribution

44
Jan
48
Feb
46
Mar
35
Apr
36
May
24
Jun
21
Jul
36
Aug
36
Sep
36
Oct
36
Nov
36
Dec
Traffic Level
Low Season

Key Connections

Tokyo (HND)
Osaka (ITM)
Kobe (UKB)
Tsushima (TSJ)
Goto Fukue (FUJ)

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 Nagasaki?

👌Decent conditions for most activities
Short Answer

Storm season alert for Nagasaki in September: beyond the 28°C, 34% rain averages, hurricane risk requires travel insurance and schedule flexibility.

Decision Factors

Typhoon season active

Western Pacific zone - expect potential typhoon activity

Vaccinations required

Yellow Fever

Warm tropical seas

28.9°C sea temperature - Tropical Bath

Very high humidity

80% average humidity

Health precautions needed

Be aware of: Leptospirosis, Hantavirus, Tuberculosis (TB)

Plenty of sunshine

8.7h of sunshine daily

Good For

  • 🏖️
    Beach lovers

    28.9°C warm seas and 34% rain probability

  • 🏛️
    Cultural tourists

    Comfortable conditions for exploring museums and sites

  • 💼
    Business travelers

    Climate-controlled meetings unaffected by weather

Who Should Avoid

  • 👴
    Elderly travelers

    80% humidity creates difficult conditions

  • 💼
    Business travelers

    Storm season may cause flight disruptions

Related Guides

Best Time to VisitWhen to AvoidNagasaki Overview
900 observations30-year historical data
Confidence: 99%

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Nagasaki in September averages 28°C with 34% precipitation probability."

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

Frequently Asked Questions: Nagasaki in September

What are the temperatures in Nagasaki in September?

Daytime highs average 28°C, nights drop to 23°C. Temperatures remain fairly consistent.

How many rainy days in Nagasaki in September?

Expect around 29 days with measurable rainfall. An umbrella is advisable.

What to wear in Nagasaki in September?

Comfortable casual wear with a light jacket for evenings.

Is September peak season in Nagasaki?

This is shoulder season—moderate prices and manageable crowds.