Climate Overview
The climate in Okushiri is temperate. The average annual temperature is 10°C and approximately 1550mm of precipitation falls per year. Okushiri receives a notable amount of rainfall throughout the year, including during its driest month. Okushiri 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 -2°C. Okushiri experiences heavy snowfall, typically from January through December.
Temperature
Temperatures in Okushiri vary considerably across the year, with a 25°C difference between the coldest and warmest months. August is the warmest month, though highs remain moderate at 23°C with a mean of 22°C. The coldest month is January, when overnight lows fall to -2°C and the daily average is -1°C. Daily temperature variation is modest, with an average difference of 3°C between highs and lows. The sharpest temperature change occurs between October and November, with a 7°C shift in average temperatures.
Precipitation
Okushiri is a fairly wet location, receiving approximately 1550mm of precipitation annually, which averages out to around 129mm per month. The wettest month is July, averaging 170mm of rainfall. December and August also tend to see above-average precipitation. The driest month is April, with just 83mm. That's 87mm less than July, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Okushiri receives heavy snowfall, accumulating around 360cm annually from January through December. The snowiest month is December, with approximately 107cm. Winter travel should account for significant snow cover.
Wind
Okushiri is relatively calm, with an average annual wind speed of 6km/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 8km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 4km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 4km/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 8km/h in winter, 6km/h in spring, 5km/h in summer, 7km/h in autumn.
Seasons
84 days until Autumn
It is currently summer in Okushiri, which began on June 21, 2026. Okushiri 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 23°C, while the coldest stretch bottoms out in January near -2°C. Autumn is next, beginning on September 23, 2026 — 84 days from now.
Spring
Temperatures range from 2 to 13°C. Precipitation is moderate at around 269mm for the season, averaging 90mm per month. Winds are generally light, averaging 6km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 14 to 23°C. Rainfall is heavy, totalling around 455mm across the season with a monthly average of 152mm. Winds are generally light, averaging 5km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from 5 to 21°C. Rainfall is heavy, totalling around 414mm across the season with a monthly average of 138mm. Expect around 35cm of snow accumulation during this period. Winds are generally light, averaging 7km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from -2 to 3°C. Rainfall is heavy, totalling around 411mm across the season with a monthly average of 137mm. Expect around 294cm of snow accumulation during this period. Winds are generally light, averaging 8km/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 Okushiri 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.
