October weather forecast
Nagasaki, Japan

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Weather in October

October in Nagasaki sees a significant dip in temperature both in daytime highs, which average 23.8°C (74.8°F), and lows, registering at 16.1°C (61°F). The rainfall struggles in the city dwindle to 86mm (3.39"), marking a sharp decline from previous months. Verdant landscapes start surrendering to hues of autumn, deeming it visually one of the most appealing months. In fact, October is considered one of the best months to visit Nagasaki, affording ideal weather conditions for sightseeing. Heading into November, expect further decreases in temperatures, ushering the advent of winter.

Temperature

The arrival of October corresponds with a light shift in temperature, down from a moderately hot 28.6°C (83.5°F) in September to a still warm 23.8°C (74.8°F). During the month of October, Nagasaki's nighttime temperature lowers to an average of 16.1°C (61°F).

Humidity

In October, the average relative humidity is 67%.

Rainfall

In Nagasaki, Japan, in October, during 6.2 rainfall days, 86mm (3.39") of precipitation is typically accumulated. In Nagasaki, during the entire year, the rain falls for 124.7 days and collects up to 1858mm (73.15") of precipitation.

Snowfall

March through November are months without snowfall.

Sea temperature

In Nagasaki, the average seawater temperature in October is 24.2°C (75.6°F).
Note: People sensitive to cold might find swimming in 24.2°C (75.6°F) challenging. However, conditions like sunshine, wind, and ambient temperature play a significant role in the overall comfort. Wetsuits, while optional, might be beneficial.

Daylight

In Nagasaki, the average length of the day in October is 11h and 23min.
On the first day of the month, sunrise is at 06:14 and sunset at 18:05. On the last day of October, sunrise is at 06:37 and sunset at 17:30 JST.

Sunshine

In October, the average sunshine is 5.9h.

UV index

The average daily maximum UV index in October is 6. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: In October, the UV index of 6 transforms into the following advice:
Prevent overexposure. Protection from the sun's harmful effects is needed. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Be mindful! Sand and water reflections can up the Sun's UV exposure.
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Frequently asked questions

What is the usual temperature for Nagasaki in October?

In Nagasaki, in October, the average high-temperature is 23.8°C (74.8°F), and the average low-temperature is 16.1°C (61°F). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines air temperature and relative humidity, in September is appraised at 32°C (89.6°F).

What is the average humidity in October in Nagasaki?

In October, the average relative humidity in Nagasaki, Japan, is 67%.

How much does it rain in Nagasaki in October?

In October, the rain falls for 6.2 days. Throughout October, 86mm (3.39") of precipitation is accumulated.

When it does not snow in Nagasaki?

In Nagasaki, snow does not fall in March through November.

What is the water temperature in October in Nagasaki?

In Nagasaki, Japan, in October, the average water temperature is 24.2°C (75.6°F). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 24.2°C (75.6°F) water.

What is the average length of the day in October in Nagasaki?

In October, the average day length in Nagasaki is 11h and 23min.

When are sunrise and sunset in October in Nagasaki?

On the first day of October in Nagasaki, sunrise is at 06:14 and sunset at 18:05. On the last day of the month, sunrise is at 06:37 and sunset at 17:30 JST.

How long on average sun shines in October in Nagasaki?

The average sunshine duration in October in Nagasaki, Japan, is 5.9h.

What is the UV index reading in October in Nagasaki?

The average daily maximum UV index in October in Nagasaki, Japan, is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average UV index

Average temperature in October
Nagasaki, Japan

Average temperature in October - Nagasaki, Japan
  • Average high temperature in October: 23.8°C

The warmest month (with the highest average high temperature) is August (31.7°C).
The month with the lowest average high temperature is January (10.4°C).

  • Average low temperature in October: 16.1°C

The month with the highest average low temperature is August (25.1°C).
The coldest month (with the lowest average low temperature) is January (3.8°C).

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Average humidity in October
Nagasaki, Japan

Average humidity in October - Nagasaki, Japan
  • Average humidity in October: 67%

The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is February (64%).

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Average rainfall in October
Nagasaki, Japan

Average rainfall in October - Nagasaki, Japan
  • Average rainfall in October: 85.8mm

The wettest month (with the highest rainfall) is June (314.6mm).
The driest month (with the least rainfall) is December (60.8mm).

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Average rainfall days in October
Nagasaki, Japan

Average rainfall days in October - Nagasaki, Japan
  • Average rainfall days in October: 6.2 days

The month with the highest number of rainy days is June (13.5 days).
The month with the least rainy days is October (6.2 days).

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Average snowfall in October
Nagasaki, Japan

Average snowfall in October - Nagasaki, Japan
  • Average snowfall in October: 0mm

The month with the highest snowfall is January (20mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).

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Average snowfall days in October
Nagasaki, Japan

Average snowfall days in October - Nagasaki, Japan
  • Average snowfall days in October: 0 days

The month with the highest number of snowfall days is January (1.2 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

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Average sea temperature in October
Nagasaki, Japan

Average sea temperature in October - Nagasaki, Japan
  • Average sea temperature in October: 24.2°C

The best month for swimming (with the highest average sea temperature) is August (27.7°C).
The coldest months (with the lowest average sea temperature) are February and March (15.3°C).

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Average daylight in October /
Average sunshine in October
Nagasaki, Japan

Average daylight in October / Average sunshine in October - Nagasaki, Japan
  • Average daylight in October: 11h and 2min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in October: 5h and 5min

The month with the most sunshine is August (Average sunshine: 6h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).

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Average UV index in October
Nagasaki, Japan

Average UV index in October - Nagasaki, Japan
  • Average UV index in October: 6

The months with the highest UV index are July and August (UV index 11).
The months with the lowest UV index are January and December (UV index 3).

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Nagasaki, Japan

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