Climate Insights for Heinola

The climate in Heinola is cool. The average annual temperature is 6°C and approximately 669mm of precipitation falls per year. Heinola receives a notable amount of rainfall throughout the year, including during its driest month. Heinola is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: Luglio, Agosto, Giugno. The coldest months are Gennaio, Febbraio, Marzo, when temperatures can drop to -8°C. Snowfall occurs from January to December, with around 141cm accumulating over the season.

Temperatures in Heinola vary considerably across the year, with a 28°C difference between the coldest and warmest months. Luglio is the warmest month, though highs remain moderate at 20°C with a mean of 17°C. The coldest month is Gennaio, when overnight lows fall to -8°C and the daily average is -6°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.

Heinola is a relatively dry area, receiving approximately 669mm of precipitation annually, which averages out to around 56mm per month. The wettest month is July, averaging 88mm of rainfall. August and June also tend to see above-average precipitation. The driest month is March, with just 38mm. That's 50mm 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 141cm accumulating over the season. January typically sees the most snow at around 32cm.

Heinola 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 October, 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 Heinola, which began on December 21, 2026. Heinola 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 Luglio at around 20°C, while the coldest stretch bottoms out in Gennaio near -8°C. Spring is next, beginning on March 20, 2026 — 1 days from now.

The best time to visit Heinola is during Giugno, Luglio and Agosto, when the weather is most comfortable for travellers. During these months, average temperatures hover around 16°C with modest rainfall averaging 76mm per month. By contrast, Gennaio can be quite cold with temperatures 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 Heinola 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.