Signal de Botrange experiences stronger winds than the centre of Belgium. Average and extreme temperatures are usually lower than at any other place in Belgium: the minimum temperature recorded (-25.6 °C) does not, however, exceed the absolute record (-30.1 °C), observed in the valley of the Lomme, at Rochefort during a temperature inversion. In winter, for three months, on average, the average temperature remains below 0 °C.