Climate Overview
The climate in Tosashimizu is warm and mild. The average annual temperature is 19°C and approximately 2210mm of precipitation falls per year. Tosashimizu receives a notable amount of rainfall throughout the year, including during its driest month. Tosashimizu 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 February, January, December, when temperatures can drop to 9°C.
Temperature
Tosashimizu sees moderate temperature variation throughout the year, ranging from 9°C to 29°C. The warmest month is August, when average highs reach 29°C and the mean temperature sits around 28°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 2°C between highs and lows. The sharpest temperature change occurs between November and December, with a 5°C shift in average temperatures.
Precipitation
Tosashimizu is a very wet location, receiving approximately 2210mm of precipitation annually, which averages out to around 184mm per month. The wettest month is June, averaging 306mm of rainfall. July and September also tend to see above-average precipitation. The driest month is December, with just 75mm. That's 231mm less than June, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.
Wind
Tosashimizu is moderately windy, with an average annual wind speed of 22km/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 26km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in July, with average winds dropping to 19km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 7km/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 26km/h in winter, 21km/h in spring, 19km/h in summer, 21km/h in autumn.
Seasons
3 days until Autumn
It is currently summer in Tosashimizu, which began on June 21, 2026. Tosashimizu 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 February near 9°C. Autumn is next, beginning on September 23, 2026 (3 days from now).
Spring
Temperatures range from 12 to 21°C. Rainfall is heavy, totalling around 587mm across the season with a monthly average of 196mm. Winds are moderate at around 21km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 23 to 29°C. Rainfall is heavy, totalling around 762mm across the season with a monthly average of 254mm. Winds are moderate at around 19km/h. Light, breathable clothing is ideal. Perfect conditions for outdoor activities.
Autumn
Temperatures range from 17 to 27°C. Rainfall is heavy, totalling around 588mm across the season with a monthly average of 196mm. Winds are moderate at around 21km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 9 to 14°C. Precipitation is moderate at around 274mm for the season, averaging 91mm per month. Winds are strong, averaging 26km/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 Tosashimizu 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.
