Most of Finland has a subarctic climate but the southern part has a humid continental climate. Temperatures are comparatively mild for its latitude because of the moderating influence of the North Atlantic Current, Baltic Sea, and more than 60,000 lakes. Finland has four very distinct seasons, but on average the winter is really dominant and year is really cold and dark all over the country. From November to March, and sometimes even till April, the thermometer is often below zero Celsius and -20 Celsius is nothing special during February. In Sodankylä (in Lappi) has had -40 degree Celsius and below several times in the last 10 years. The summer is really short, lasting about 2-3 months and is usually at 15-25 Celsius depending on the location. Finland has three main kinds of weather, the coastal weather and the inland weather and the north weather. The coastal weather (especially the area between Vaasa-Turku-Helsinki) is a lot windier and warmer than the inland and the north weather (pretty much everything north from Oulu) is a lot colder and darker for longer period of time.
Because Costa Rica is located only about eight degrees north of the equator, the climate is tropics year round. However, this varies depending on elevation and rainfall. Therefore, it is greatly affected by the geography-of-costa-rica.
French Guianas climate is usually tropical, hot or humid, due to the large amount of rainforest there is in French Guiana. But the temperature varies during the season change.warm and tropical with lots of rain and sunshine throughout the year. French Guiana is locarted quite near to the equator.
The Seychelles islands have a humid, tropical climate with temperatures ranging between 24 and 32 degrees Celsius. The North-West trade winds blow from October to May bringing a humid, warm air front, with low wind speeds. The South-East trade winds blow from May to September, generating a drier, cooler weather with stronger winds.