Climate Insights for Helsinki

The climate in Helsinki is cool. The average annual temperature is 7°C and approximately 766 mm of precipitation falls per year. Helsinki receives a notable amount of rainfall throughout the year, including during its driest month. Helsinki is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, February, March, when temperatures can drop to -6°C. Snowfall occurs from January to December, with around 172cm accumulating over the season.The climate in Helsinki is cool. The average annual temperature is 44°F and approximately 30.2 in of precipitation falls per year. Helsinki receives a notable amount of rainfall throughout the year, including during its driest month. Helsinki is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, February, March, when temperatures can drop to 21°F. Snowfall occurs from January to December, with around 68in accumulating over the season.

Temperatures in Helsinki vary considerably across the year, with a 28°C difference between the coldest and warmest months. July is the warmest month, though highs remain moderate at 22°C with a mean of 18°C. The coldest month is January, when overnight lows fall to -6°C and the daily average is -4°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows. The sharpest temperature change occurs between April and May, with a 7°C shift in average temperatures.Temperatures in Helsinki vary considerably across the year, with a 50°F difference between the coldest and warmest months. July is the warmest month, though highs remain moderate at 71°F with a mean of 65°F. The coldest month is January, when overnight lows fall to 21°F and the daily average is 25°F. Daily temperature variation is modest, with an average difference of 11°F between highs and lows. The sharpest temperature change occurs between April and May, with a 12°F shift in average temperatures.

Helsinki is a relatively dry area, receiving approximately 766 mm of precipitation annually, which averages out to around 64 mm per month. The wettest month is July, averaging 92 mm of rainfall. August and September also tend to see above-average precipitation. The driest month is March, with just 40 mm. That's 52 mm 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. Snowfall is a regular feature from January to December, with around 172cm accumulating over the season. January typically sees the most snow at around 49cm.Helsinki is a relatively dry area, receiving approximately 30.2 in of precipitation annually, which averages out to around 2.5 in per month. The wettest month is July, averaging 3.6 in of rainfall. August and September also tend to see above-average precipitation. The driest month is March, with just 1.6 in. That's 2 in 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. Snowfall is a regular feature from January to December, with around 68in accumulating over the season. January typically sees the most snow at around 19in.

Helsinki is mildly breezy, with an average annual wind speed of 14km/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 16km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 12km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 4km/h 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 15km/h in winter, 13km/h in spring, 13km/h in summer, 15km/h in autumn.Helsinki is moderately windy, with an average annual wind speed of 9mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is January, averaging 10mph, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in May, with average winds dropping to 8mph, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2mph 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 10mph in winter, 8mph in spring, 8mph in summer, 9mph in autumn.

The best time to visit Helsinki is during June, July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 82 mm per month. By contrast, January can be quite cold with temperatures dropping to -6°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 best time to visit Helsinki is during June, July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 63°F with modest rainfall averaging 3.2 in per month. By contrast, January can be quite cold with temperatures dropping to 21°F. 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 Helsinki 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.The table below shows monthly climate averages for Helsinki based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Fahrenheit (°F). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in inches (in) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in miles per hour (mph). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.