Climate Insights for Niigata

The climate in Niigata is temperate. The average annual temperature is 15°C and approximately 1849mm of precipitation falls per year. Niigata receives a notable amount of rainfall throughout the year, including during its driest month. Niigata 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 3°C. Snowfall occurs from January to December, with around 70cm accumulating over the season.

Temperatures in Niigata vary considerably across the year, with a 26°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 29°C and the mean temperature sits around 27°C. January is the coolest month, with minimum temperatures around 3°C and an average of 5°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between September and October, with a 6°C shift in average temperatures.

Niigata is a fairly wet location, receiving approximately 1849mm of precipitation annually, which averages out to around 154mm per month. The wettest month is December, averaging 224mm of rainfall. July and January also tend to see above-average precipitation. The driest month is May, with just 104mm. That's 120mm less than December, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Snowfall is a regular feature from January to December, with around 70cm accumulating over the season. January typically sees the most snow at around 37cm.

Niigata is moderately windy, with an average annual wind speed of 25km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 33km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in July, with average winds dropping to 18km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 15km/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 32km/h in winter, 24km/h in spring, 19km/h in summer, 25km/h in autumn.

It is currently spring in Niigata, which began on March 20, 2026. Niigata 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 3°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The table below shows monthly climate averages for Niigata 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. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. 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.