Säänjakso

Säänjakso is a Finnish term that translates to "weather period" or "weather cycle." It refers to a recurring pattern or sequence of weather conditions that typically occurs within a specific region over a defined timeframe. These periods are not strictly defined by meteorological standards but are often observed and described based on typical climatic variations throughout the year.

In Finland, common säänjakso examples include the transition from winter to spring, characterized by thawing, increasing daylight, and fluctuating temperatures. The summer säänjakso is typically associated with warmer temperatures, longer days, and potentially periods of drought or heavy rainfall. Autumn brings cooler weather, changing foliage, and increased precipitation. The winter säänjakso is defined by cold temperatures, snow cover, and short daylight hours.

These weather periods are influenced by larger atmospheric patterns such as the North Atlantic Oscillation and seasonal shifts in solar radiation. While the exact timing and intensity of each säänjakso can vary annually, the general sequence of weather types is a predictable aspect of Finland's climate. Understanding these typical weather periods can be useful for various activities, including agriculture, outdoor recreation, and infrastructure planning. The concept highlights the cyclical nature of weather and its impact on the natural environment and human life.