Climate Insights for Hamatonbetsu

The climate in Hamatonbetsu is cool. The average annual temperature is 7°C and approximately 1150mm of precipitation falls per year. Hamatonbetsu receives a notable amount of rainfall throughout the year, including during its driest month. Hamatonbetsu 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 -8°C. Hamatonbetsu experiences heavy snowfall, typically from January through December.

Temperatures in Hamatonbetsu vary considerably across the year, with a 29°C difference between the coldest and warmest months. August is the warmest month, though highs remain moderate at 21°C with a mean of 19°C. The coldest month is February, when overnight lows fall to -8°C and the daily average is -6°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between October and November, with a 7°C shift in average temperatures.

Hamatonbetsu is a moderately rainy area, receiving approximately 1150mm of precipitation annually, which averages out to around 96mm per month. The wettest month is August, averaging 158mm of rainfall. October and November also tend to see above-average precipitation. The driest month is February, with just 50mm. That's 108mm less than August, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Hamatonbetsu receives heavy snowfall, accumulating around 241cm annually from January through December. The snowiest month is December, with approximately 61cm. Winter travel should account for significant snow cover.

Hamatonbetsu is moderately windy, with an average annual wind speed of 25km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is November, averaging 30km/h, which can feel quite blustery and may affect 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 11km/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 27km/h in winter, 26km/h in spring, 20km/h in summer, 27km/h in autumn.

It is currently spring in Hamatonbetsu, which began on March 20, 2026. Hamatonbetsu 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 21°C, while the coldest stretch bottoms out in February near -8°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Hamatonbetsu is during September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 94mm per month. By contrast, August can be uncomfortably hot with highs reaching 21°C, while February is the coldest period with lows dropping to -8°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Hamatonbetsu 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.