Climate Insights for Suomussalmi

The climate in Suomussalmi is cool. The average annual temperature is 2°C and approximately 734mm of precipitation falls per year. Suomussalmi receives a notable amount of rainfall throughout the year, including during its driest month. Suomussalmi is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: Juli, August, Juni. The coldest months are Januar, Februar, März, when temperatures can drop to -13°C. Suomussalmi experiences heavy snowfall, typically from January through December.

Temperatures in Suomussalmi vary considerably across the year, with a 32°C difference between the coldest and warmest months. Juli is the warmest month, though highs remain moderate at 19°C with a mean of 16°C. The coldest month is Januar, when overnight lows fall to -13°C and the daily average is -10°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows. The sharpest temperature change occurs between April and May, with a 7°C shift in average temperatures.

Suomussalmi is a relatively dry area, receiving approximately 734mm of precipitation annually, which averages out to around 61mm per month. The wettest month is August, averaging 98mm of rainfall. July and September also tend to see above-average precipitation. The driest month is March, with just 36mm. That's 62mm 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. Suomussalmi receives heavy snowfall, accumulating around 204cm annually from January through December. The snowiest month is December, with approximately 38cm. Winter travel should account for significant snow cover.

Suomussalmi is mildly breezy, with an average annual wind speed of 16km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 17km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 14km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3km/h between the calmest and windiest months.

It is currently winter in Suomussalmi, which began on December 21, 2026. Suomussalmi 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 Juli at around 19°C, while the coldest stretch bottoms out in Januar near -13°C. Spring is next, beginning on March 20, 2026 — 1 days from now.

The best time to visit Suomussalmi is during Juli, when the weather is most comfortable for travellers. During these months, average temperatures hover around 16°C with modest rainfall averaging 95mm per month. By contrast, Januar can be quite cold with temperatures dropping to -13°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 Suomussalmi 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.