The last frost in Hay-On-Wye, Wales was the night of the Monday 08/03/2021 to Tuesday 09/03/2021, with a minimum air temperature of 2.0°C (35.6°F), and therefore a probable minimum ground temperature of around -1.0°C (30.2°F).
There are no frosts forecast for Hay-On-Wye in the next 5-days.