Climate Insights for Nanjō

The climate in Nanjō is warm and mild. The average annual temperature is 24°C and approximately 1969mm of precipitation falls per year. Nanjō receives a notable amount of rainfall throughout the year, including during its driest month. Nanjō 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, March, when temperatures can drop to 18°C.

Nanjō sees moderate temperature variation throughout the year, ranging from 18°C to 29°C. The warmest month is August, when average highs reach 29°C and the mean temperature sits around 29°C. January is the coolest month, with minimum temperatures around 18°C and an average of 19°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows. The sharpest temperature change occurs between November and December, with a 3°C shift in average temperatures.

Nanjō is a fairly wet location, receiving approximately 1969mm of precipitation annually, which averages out to around 164mm per month. The wettest month is June, averaging 241mm of rainfall. May and August also tend to see above-average precipitation. The driest month is February, with just 97mm. That's 143mm less than June, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.

Nanjō is very windy, with an average annual wind speed of 32km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 37km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in May, with average winds dropping to 28km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 9km/h 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 35km/h in winter, 30km/h in spring, 29km/h in summer, 32km/h in autumn.

It is currently spring in Nanjō, which began on March 20, 2026. Nanjō is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 29°C, while the coldest stretch bottoms out in January near 18°C. Summer is next, beginning on June 21, 2026 — 88 days from now.

The best time to visit Nanjō is during February, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 97mm per month. By contrast, August can be uncomfortably hot with highs reaching 29°C, while January is the coldest period with lows dropping to 18°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 table below shows monthly climate averages for Nanjō 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.