September 2025 Compared to September Months from 1924 to 2024

Astronomical Autumn vs. Meteorological Autumn

Meteorological Autumn and Astronomical Autumn are two different ways of defining the seasons: Meteorological Autumn: Meteorological seasons are based on the calendar months and are primarily used by meteorologists and climatologists for consistent and simplified record-keeping and forecasting. In the meteorological definition, autumn is considered to be the three calendar months of September, October, and November in the Northern Hemisphere, and March, April, and May in the Southern Hemisphere.

Meteorological vs Astronomical Spring

Meteorological Spring and Astronomical Spring are two ways of defining the start of spring, but they are based on different criteria. Meteorological Spring refers to the three calendar months of March, April, and May in the Northern Hemisphere (or September, October, and November in the Southern Hemisphere). These months are considered to be spring because they generally have milder temperatures and more rainfall than the preceding winter months, and the days start to become longer.

What is "Indian summer"?

What is “Indian summer” and when does it happen? Mid-autumn is the time for the “return of summer”. Though all of us understand pretty well that a couple of warm and sunny autumn weeks will soon be replaced by the first frost, we continue calling this short period as summer.

Buran & Purga: A Tale of Two Winds across Eastern Asia and the Tundra

In the vast expanse of eastern Asia and the Arctic tundra, a formidable wind known as the Buran or Purga commands attention. This wind, with its dual identity, manifests itself in different seasons and regions, leaving its mark on the landscapes it encounters. The Buran, also referred to as Purga when it sweeps across the tundra, is most likely to blow during the winter season.

Böhm: The Chilling and Arid Wind of Central Europe

In the heart of Central Europe, a wintry wind known as Böhm makes its presence known, leaving a distinct mark on the region’s climate. Böhm is most commonly experienced during the colder months of autumn, winter, and early spring. As the seasons transition from fall to spring, this chilling wind announces its arrival, bringing with it a unique combination of coldness and dryness.

Is it Föhn or Foehn?

Föhn winds, also known as foehn winds or simply foehns, are warm and dry downslope winds that occur on the lee side of a mountain range. These winds are typically characterized by their ability to rapidly raise temperatures and reduce humidity in the regions where they occur. Föhn winds are formed as moist air approaches a mountain range.

Porto, Portugal Climate Outlook

The climate in Porto, Portugal is classified as a Mediterranean climate with mild, rainy winters and warm, dry summers. It is strongly influenced by its proximity to the Atlantic Ocean. Here are some characteristics of Porto’s climate: Summers (June to September): Summers in Porto are warm and dry, with average high temperatures ranging from 20°C to 25°C (68°F to 77°F).

Nortada: The Cool and Refreshing Wind of Portugal's Coast

The Nortada wind usually happens during the spring and summer seasons in Portugal. From May to September, this amazing wind comes along the coast to bring relief from the heat and make everything feel cooler and more comfortable. Nortada wind happens because of the difference in temperature between the land and the sea.

August 2025 Compared to August Months from 1924 to 2024