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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.

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Have You Seen These Underwater Bubbles?

Icy underwater bubbles are one of the most curious natural phenomena. In the Canadian province of Alberta, there is Lake Abraham, which is known among scientists and nature lovers because of an unusual phenomenon: a large number of ice bubbles that have frozen under water. These fantastic circles are actually made up of methane bubbles.

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What’s the difference between glaze ice (from freezing rain) and black ice?

In winter forecasts you may hear two very similar-sounding terms. In Russian they’re «гололёд» and «гололедица» — and they describe different kinds of ice. Glaze ice (ice on objects) This is ice that coats objects: tree branches, power lines, roofs, railings, cars. It most often forms during freezing rain/drizzle when the air temperature is around 0 °C (or slightly below) and supercooled droplets freeze immediately on contact, creating a smooth, glassy layer.

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December 2025 Compared to December Months from 1924 to 2024

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November 2025 Compared to November Months from 1924 to 2024

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October 2025 Compared to October Months from 1924 to 2024

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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.

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September 2025 Compared to September Months from 1924 to 2024

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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.

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August 2025 Compared to August Months from 1924 to 2024