Climate Insights for Rishiri Town

The climate in Rishiri Town is cool. The average annual temperature is 8°C and approximately 1371mm of precipitation falls per year. Rishiri Town receives a notable amount of rainfall throughout the year, including during its driest month. Rishiri Town 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 January, February, December, when temperatures can drop to -4°C. Rishiri Town experiences heavy snowfall, typically from January through December.

Temperatures in Rishiri Town vary considerably across the year, with a 26°C difference between the coldest and warmest months. August is the warmest month, though highs remain moderate at 22°C with a mean of 21°C. The coldest month is January, when overnight lows fall to -4°C and the daily average is -2°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows. The sharpest temperature change occurs between October and November, with a 7°C shift in average temperatures.

Rishiri Town is a fairly wet location, receiving approximately 1371mm of precipitation annually, which averages out to around 114mm per month. The wettest month is November, averaging 177mm of rainfall. December and October also tend to see above-average precipitation. The driest month is April, with just 60mm. That's 117mm less than November, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Rishiri Town receives heavy snowfall, accumulating around 328cm annually from January through December. The snowiest month is December, with approximately 98cm. Winter travel should account for significant snow cover.

Rishiri Town is very windy, with an average annual wind speed of 37km/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 45km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in July, with average winds dropping to 27km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 18km/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 42km/h in winter, 36km/h in spring, 29km/h in summer, 40km/h in autumn.

It is currently spring in Rishiri Town, which began on March 20, 2026. Rishiri Town 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 22°C, while the coldest stretch bottoms out in January near -4°C. Summer is next, beginning on June 21, 2026 — 88 days from now.

The table below shows monthly climate averages for Rishiri Town 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.