The forecast says 4°. Your garden says frost.

On clear, calm nights the ground is 2–4° colder than the air temperature weather apps show. Frost Tonight estimates the temperature at your plants – garden, pots or balcony – and sends one message the evening before, only when one of your plants is at risk.

iPhone app. Coming to the App Store autumn 2026.

Privacy policy · Support

Frost Tonight is made by Peter Tullin, Tullin Advisory (CVR 35751793), Copenhagen, Denmark.