Southern Finland Weather by Month — Temperature & Rainfall Guide

Southern Finland is a region in Finland. Many people wonder what the weather conditions are in Southern Finland over the year. What is the best time to visit Southern Finland?

This page shows the average weather conditions by month in Southern Finland over the year in: January, February, March, April, May, June, July, August, September, October, November, December.

In January the weather in Southern Finland is generally poor. January is a winter month. The average maximum daytime temperatures are very low and range from -3°C (27°F) in Parikkala to 2°C (36°F) in Hanko. It is a very cold month in some areas, so be prepared and make sure to dress up warm.

Find more detailed climate information for Southern Finland in January here.

In February the weather in Southern Finland is generally poor. February is a winter month. The average maximum daytime temperatures are very low and range from -3°C (27°F) in Melkoniemi to 0°C (32°F) in Uusikaupunki. On average, this month is one of the coldest months of the year in Southern Finland. So be prepared and make sure to dress up warm.

Find more detailed climate information for Southern Finland in February here.

In March the weather in Southern Finland is generally poor. The temperatures range from very low in Taipalsaari with 1°C (34°F) to low in Turku with 4°C (39°F). It is a very cold month in some areas, so be prepared and make sure to dress up warm.

Find more detailed climate information for Southern Finland in March here.

In April the weather in Southern Finland is generally poor. The average maximum daytime temperatures are low and range from 5°C (41°F) in Hanko to 10°C (50°F) in Loimaa.

Find more detailed climate information for Southern Finland in April here.

In May the weather in Southern Finland ranges from poor in Hanko to tolerable in Helsinki. The temperatures range from low in Hanko with 10°C (50°F) to moderate in Laukkoski with 17°C (63°F).

Find more detailed climate information for Southern Finland in May here.

In June the weather in Southern Finland ranges from tolerable in Hanko to perfect in Helsinki. June is a summer month. The temperatures range from moderate in Hanko with 15°C (59°F) to pleasant in Kouvola with 21°C (70°F).

Find more detailed climate information for Southern Finland in June here.

In July the weather in Southern Finland ranges from pleasant in Hanko to perfect in Helsinki. July is a summer month. The temperatures range from pleasant in Hanko with 19°C (66°F) to high in Laukkoski with 24°C (75°F). On average, this month is the warmest month of the year in Southern Finland.

Find more detailed climate information for Southern Finland in July here.

In August the weather in Southern Finland is generally perfect. August is a summer month. The average maximum daytime temperatures are pleasant and range from 20°C (68°F) in Hanko to 22°C (72°F) in Laukkoski.

Find more detailed climate information for Southern Finland in August here.

In September the weather in Southern Finland is generally tolerable. In Helsinki you can expect mild maximum average daytime temperatures around 16°C (61°F) and nighttime temperatures around 8°C (46°F).

Find more detailed climate information for Southern Finland in September here.

In October the weather in Southern Finland ranges from poor in Helsinki to unpleasant in Hanko. The average maximum daytime temperatures are low and range from 8°C (46°F) in Parikkala to 11°C (52°F) in Hanko.

Find more detailed climate information for Southern Finland in October here.

In November the weather in Southern Finland is generally poor. The average maximum daytime temperatures are low and range from 3°C (37°F) in Parikkala to 7°C (45°F) in Hanko. It is a very cold month in some areas, so be prepared and make sure to dress up warm.

Find more detailed climate information for Southern Finland in November here.

In December the weather in Southern Finland is generally poor. December is a winter month. The temperatures range from very low in Parikkala with -1°C (30°F) to low in Hanko with 4°C (39°F). It is a very cold month in some areas, so be prepared and make sure to dress up warm.

Find more detailed climate information for Southern Finland in December here.