Climate Overview
The climate in Tateyama is warm and mild. The average annual temperature is 18°C and approximately 2154mm of precipitation falls per year. Tateyama receives a notable amount of rainfall throughout the year, including during its driest month. Tateyama is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, September, July. The coldest months are February, January, March, when temperatures can drop to 9°C.
Temperature
Tateyama sees moderate temperature variation throughout the year, ranging from 9°C to 28°C. The warmest month is August, when average highs reach 28°C and the mean temperature sits around 27°C. February is the coolest month, with minimum temperatures around 9°C and an average of 11°C. Daily temperature variation is modest, with an average difference of 3°C between highs and lows. The sharpest temperature change occurs between November and December, with a 4°C shift in average temperatures.
Precipitation
Tateyama is a very wet location, receiving approximately 2154mm of precipitation annually, which averages out to around 180mm per month. The wettest month is October, averaging 301mm of rainfall. June and September also tend to see above-average precipitation. The driest month is December, with just 107mm. That's 195mm less than October, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.
Wind
Tateyama is relatively calm, with an average annual wind speed of 7km/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 8km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 6km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.
Seasons
91 days until Autumn
It is currently summer in Tateyama, which began on June 21, 2026. Tateyama 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 28°C, while the coldest stretch bottoms out in February near 9°C. Autumn is next, beginning on September 23, 2026 — 91 days from now.
Spring
Temperatures range from 11 to 20°C. Rainfall is heavy, totalling around 494mm across the season with a monthly average of 165mm. Winds are generally light, averaging 7km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 21 to 28°C. Rainfall is heavy, totalling around 565mm across the season with a monthly average of 188mm. Winds are generally light, averaging 6km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 16 to 26°C. Rainfall is heavy, totalling around 756mm across the season with a monthly average of 252mm. Winds are generally light, averaging 7km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 9 to 15°C. Rainfall is heavy, totalling around 340mm across the season with a monthly average of 113mm. Winds are generally light, averaging 8km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
The table below shows monthly climate averages for Tateyama 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.
