Nagasaki Weather in October

October in Nagasaki typically sees daytime highs of 23°C (73°F) and nighttime lows of 19°C (66°F). Rainfall is also possible this month, so it's worth packing an umbrella.

Rainfall in Nagasaki in October

Historically, the month has about 13 days of rain, averaging 110 mm (4.3 in) in total. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Nagasaki in October

Expect highs of 23°C (73°F) in Nagasaki in October, with nights dropping to around 19°C (66°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With lows of 19°C (66°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Nagasaki in October

The area enjoys a moderate level of sunlight, with around 180 hours. It's a good balance between sunny and cloudy days.

Wind Speed in Nagasaki in October

Average wind conditions reach 1 m/s (2 knots) in October. This creates generally peaceful weather with subtle air movement. Remember this is an average: some days are windless while others have noticeable or very gentle breezes.

Average water temperature in October

The water is 22°C (72°F) this month, warm enough that getting in requires no effort at all. Good conditions for swimming, snorkeling, or just floating around.

If you're a fan of comfortable temperatures and drier conditions, October is a great time to visit.

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For a detailed overview over the year and the best time to visit Japan, check out our Nagasaki's climate page.

Nagasaki Temperature in October

Min Temperature 19°C (66°F)  

Max Temperature 23°C (73°F)  

Water Temperature 22°C (72°F)  

Chance of Rain 44%  

Precipitation 110 mm (4.3 in)  

Rainy days 13 days  

Humidity 67%  

Windspeed 1 m/s (2 knots)  

Sunshine 180 hours  

Percentage Sunshine 50%  

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Nagasaki typically drop from around 26°C (79°F) at the start of October to approximately 21°C (70°F) by the end. Nights are pleasant, with lows typically ranging from 13°C (55°F) to 19°C (66°F).

Average temperatures in October

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Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in October

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Historical weather for Nagasaki in October

Browse day-by-day weather records for Nagasaki spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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Nagasaki historical weather extremes in October

The extremes listed below come from historical weather data collected in Nagasaki from 1976 through 2025.

• The hottest October day on record in Nagasaki reached 31°C (88°F) (October 10, 2021).
• Nagasaki experienced its chilliest October day on October 31, 1997, reaching only 13°C (55°F).
• Nighttime temperatures dropped to 6°C (43°F) on October 21, 1991, marking the coldest October night on record.

What to Wear in Nagasaki in October

Pleasant temperatures in October mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. Expect water temperatures of around 22°C (72°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Nagasaki in October

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

7/10

Cycling

9/10

Walking

9/10

Camping

6/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Japan, check out our Nagasaki's climate page.

More climate data for Nagasaki

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Nagasaki climate overview or explore weather in Japan.