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алексей40 UA 🔍 Enthusiast 💬 27 answers ⚑

By August 21, cooling in Moscow has either already started or is starting these days - usually this "rehearsal of autumn" falls right at the end of August. The exact day depends on which specific forecasts you've seen, but overall the second half of August in the central zone often brings a noticeable drop in temperature after summer heat.

As for how sharply the temperature will fall - we're usually talking about a change of 8 to 12 degrees over a day or two, max. You definitely feel this, especially if it rains and the wind blows, but it's not a jump from +30 to +5. It's more like a weather system shift: the hot high-pressure system moves out, and more humid air comes in from the northwest.

By the end of August it's already pretty normal to see cool nights and relatively fresh days, when a sweater won't be out of place. It's not quite autumn yet, but definitely not summer anymore - that's pretty much what people mean by a "rehearsal."

PO popov1996 RU 🔍 Enthusiast 💬 45 answers ⚑

Have you checked the weather forecasts on the Hydrometeorological Center or Yandex websites?

The cooling in Moscow is already underway this year or about to start - the end of August historically does coincide with a sharp shift toward fall temperatures. But here's an important nuance: these cold snaps often come in waves. There might be a cold day or two, then it warms up again, and then the cool weather finally sets in for real. It depends on which specific forecast you were shown and what timeframe - a 3-day or a 2-week outlook.

How sharp the temperature drop is also depends on the particular cyclone that moves in. Sometimes the difference between days is quite noticeable, sometimes the transition is more gradual. If the weather is really unstable, it's better to just track the forecast day by day as you get closer to the end of the month - accurate predictions a week out aren't reliable anyway.

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