Met Office

Frost

An introduction to how frost forms and why it can be difficult to forecast.

Frost
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Frost is normally formed on still, clear and cold nights. The cool air causes water vapour in the air to condense and form droplets on the ground. When the temperature of the ground or surface is below 0 °C the moisture freezes into ice crystals - known as the frost point.

Find out more about different types of frost and the challenges involved in forecasting it in the articles below.

  • Frost

    Types of frost

    Introduction to air and hoar frost and how they differ from glaze and rime.

  • Hoar frost

    Forecasting frost

    Find out why frost can be challenging to forecast.

  • Clouds thumb

    Learn about the weather

    Find out more about weather phenomena including clouds, rain and snow.

  • Snow thumb

    Snow and snow forecasts

    What is snow? Will it be a white Christmas? How do we forecast snow? Find out more about snow in the UK.

  • Fog

    What is fog?

    What is fog and what causes the different types of fog?

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