Climate Insights for Nagasaki

The climate in Nagasaki is temperate. The average annual temperature is 18°C and approximately 2,258 mm of precipitation falls per year. Nagasaki receives a notable amount of rainfall throughout the year, including during its driest month. Nagasaki is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, September. The coldest months are January, February, December, when temperatures can drop to 7°C.The climate in Nagasaki is temperate. The average annual temperature is 64°F and approximately 88.9 in of precipitation falls per year. Nagasaki receives a notable amount of rainfall throughout the year, including during its driest month. Nagasaki is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, September. The coldest months are January, February, December, when temperatures can drop to 44°F.

Temperatures in Nagasaki vary considerably across the year, with a 23°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 30°C and the mean temperature sits around 28°C. January is the coolest month, with minimum temperatures around 7°C and an average of 8°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between November and December, with a 5°C shift in average temperatures.Temperatures in Nagasaki vary considerably across the year, with a 41°F difference between the coldest and warmest months. The warmest month is August, when average highs reach 85°F and the mean temperature sits around 82°F. January is the coolest month, with minimum temperatures around 44°F and an average of 47°F. Daily temperature variation is modest, with an average difference of 7°F between highs and lows. The sharpest temperature change occurs between November and December, with a 10°F shift in average temperatures.

Nagasaki is a very wet location, receiving approximately 2,258 mm of precipitation annually, which averages out to around 188 mm per month. The wettest month is June, averaging 400 mm of rainfall. July and August also tend to see above-average precipitation. The driest month is January, with just 80 mm. That's 320 mm less than June, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.Nagasaki is a very wet location, receiving approximately 88.9 in of precipitation annually, which averages out to around 7.4 in per month. The wettest month is June, averaging 15.7 in of rainfall. July and August also tend to see above-average precipitation. The driest month is January, with just 3.1 in. That's 12.6 in less than June, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Nagasaki is mildly breezy, with an average annual wind speed of 15km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 18km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 12km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 6km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 18km/h in winter, 14km/h in spring, 13km/h in summer, 15km/h in autumn.Nagasaki is moderately windy, with an average annual wind speed of 9mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is February, averaging 11mph, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in June, with average winds dropping to 7mph, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 4mph gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 11mph in winter, 9mph in spring, 8mph in summer, 9mph in autumn.

The best time to visit Nagasaki is during November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 16°C with modest rainfall averaging 93 mm per month. By contrast, August can be uncomfortably hot with highs reaching 30°C, while January is the coldest period with lows dropping to 7°C. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.The best time to visit Nagasaki is during November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 60°F with modest rainfall averaging 3.7 in per month. By contrast, August can be uncomfortably hot with highs reaching 85°F, while January is the coldest period with lows dropping to 44°F. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Nagasaki based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.The table below shows monthly climate averages for Nagasaki based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Fahrenheit (°F). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in miles per hour (mph). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.