Climate Overview
The climate in Agematsu is cool. The average annual temperature is 10°C and approximately 2381mm of precipitation falls per year. Agematsu receives a notable amount of rainfall throughout the year, including during its driest month. Agematsu 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. Snowfall occurs from January to December, with around 180cm accumulating over the season.
Temperature
Temperatures in Agematsu vary considerably across the year, with a 33°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 26°C and the mean temperature sits around 22°C. The coldest month is January, when overnight lows fall to -7°C and the daily average is -3°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between September and October, with a 7°C shift in average temperatures.
Precipitation
Agematsu is a very wet location, receiving approximately 2381mm of precipitation annually, which averages out to around 198mm per month. The wettest month is July, averaging 362mm of rainfall. June and September also tend to see above-average precipitation. The driest month is January, with just 106mm. That's 256mm less than July, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Snowfall is a regular feature from January to December, with around 180cm accumulating over the season. January typically sees the most snow at around 50cm.
Wind
Agematsu is relatively calm, with an average annual wind speed of 10km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 11km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 8km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 3km/h gap between the calmest and windiest months.
Seasons
90 days until Summer
It is currently spring in Agematsu, which began on March 20, 2026. Agematsu 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 26°C, while the coldest stretch bottoms out in January near -7°C. Summer is next, beginning on June 21, 2026 — 90 days from now.
Spring
Temperatures range from -1 to 19°C. Rainfall is heavy, totalling around 595mm across the season with a monthly average of 198mm. Winds are generally light, averaging 11km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 13 to 26°C. Rainfall is heavy, totalling around 861mm across the season with a monthly average of 287mm. Winds are generally light, averaging 9km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from 2 to 23°C. Rainfall is heavy, totalling around 586mm across the season with a monthly average of 195mm. Expect around 8cm of snow accumulation during this period. Winds are generally light, averaging 9km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from -7 to 4°C. Rainfall is heavy, totalling around 339mm across the season with a monthly average of 113mm. Expect around 124cm of snow accumulation during this period. Winds are generally light, averaging 11km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.
Monthly Climate Data
The table below shows monthly climate averages for Agematsu 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.
