Climate Insights for Hanko

The climate in Hanko is cool. The average annual temperature is 8°C and approximately 683mm of precipitation falls per year. Hanko receives a notable amount of rainfall throughout the year, including during its driest month. Hanko is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: Agosto, Luglio, Settembre. The coldest months are Gennaio, Febbraio, Marzo, when temperatures can drop to -2°C. Snowfall occurs from January to December, with around 82cm accumulating over the season.

Hanko sees moderate temperature variation throughout the year, ranging from -2°C to 18°C. Agosto is the warmest month, though highs remain moderate at 18°C with a mean of 17°C. The coldest month is Gennaio, when overnight lows fall to -2°C and the daily average is 0°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows. The sharpest temperature change occurs between May and June, with a 6°C shift in average temperatures.

Hanko is a relatively dry area, receiving approximately 683mm of precipitation annually, which averages out to around 57mm per month. The wettest month is October, averaging 85mm of rainfall. August and November also tend to see above-average precipitation. The driest month is May, with just 31mm. That's 54mm less than October, 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 82cm accumulating over the season. January typically sees the most snow at around 25cm.

Hanko is very windy, with an average annual wind speed of 34km/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 39km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in May, with average winds dropping to 28km/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 38km/h in winter, 31km/h in spring, 29km/h in summer, 36km/h in autumn.

It is currently winter in Hanko, which began on December 21, 2026. Hanko 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 Agosto at around 18°C, while the coldest stretch bottoms out in Gennaio near -2°C. Spring is next, beginning on March 20, 2026 — 1 days from now.

The best time to visit Hanko is during Luglio and Agosto, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 68mm per month. By contrast, Gennaio can be quite cold with temperatures dropping to -2°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Hanko 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.