From the Meuse to the High Fens
Liège is the province of contrasts: the Hesbaye and the Meuse valley in the west, the raised bogs of the High Fens in the east, the Ardennes to the south and the German-speaking cantons in the north-east. The city of Liège lies at just 70 metres where the Meuse meets the Ourthe, while the Botrange plateau reaches 694 metres, the highest point in the country. Roughly 600 metres of height separate them, and a completely different climate.
The figures bear it out. Liège's average January night-time low is 0.9 degrees, in Büllingen at 581 metres it is minus 2.0. The city collects about 886 millimetres of rain a year, the area around Verviers 1,058 millimetres on 173 days. Westerly winds pile up against the first heights and rain out, which makes the upland edge one of the wettest places in the country.
The High Fens and the winter world
The raised bog of the High Fens, Hautes Fagnes in French, spreads around the High Fens and Baraque Michel at more than 650 metres. Peat, heather and mist set the scene. Snow often settles here while rain falls in Liège, and the cross-country trails and footpaths draw people from all over the country in winter. How reliable cover is can be read in our guide Snow in the Ardennes.
For walkers, fog is the bigger danger than snow. On the boardwalks of the Fens you can lose your bearings in thick mist, and temperatures swing within minutes. The municipalities of Waimes at 549 metres and Jalhay at 387 lie in the heart of this weather zone, where summer stays cool, highs around 20 degrees, and frost often returns as early as October.
East Belgium
In the east lies the German-speaking Community with Eupen at 280 metres, Sankt Vith at 480, Raeren and Kelmis. Eupen records 1,053 millimetres of rain and 173 wet days a year, and a January high of only 4.5 degrees. Sankt Vith adds a January night-time low of minus 1.5 and about 20.5 degrees in July. It is a climate closer to the edge of the Eifel than to the Brussels basin.
Weather patterns often follow the nearness of Germany: an easterly brings dry cold in winter, a damp westerly brings mild air. The reservoir at Robertville, at 498 metres, and Lake Gileppe at 301 hold the abundant water of the region. On clear winter days haze rises from the valleys near Eupen, and long views from the heights are superb.
The Meuse, the Ourthe and the Spa-Francorchamps circuit
The Meuse is the lifeline of the province, and its level shapes life in Huy and Seraing. After the heavy rain of July 2021 the water in the Vesdre and Ourthe valleys rose sharply, and the experience has sharpened flood awareness. Gauge readings are on Wallonia's hydrometric pages. In the south, the stream tumbling over the Coo waterfalls on the Amblève is especially impressive.
Further north, the Spa-Francorchamps circuit stands at 482 metres, famous for weather that changes in minutes: sunshine on one side of the track, rain on the other. Spa itself, at 250 metres, earned its spa-town fame through spring water that flows freely when it rains. Anyone planning a race weekend keeps an eye on the radar map and soon learns to anticipate the wind.
Practical advice
For planning, remember that each step up in height costs noticeable warmth in this province. A day trip from Liège to Malmedy at 340 metres therefore already calls for an extra layer. The 14-day forecast for Liège shows the trend; for the heights, compare it with the outlook for Botrange.
The neighbours are Namur to the south-west, Luxembourg to the south and Limburg to the north. Anyone walking the Fens plans with a margin: warm clothing, rain cover and a timely return before the fog rolls in. In spring, finally, watch the peat bogs: when the snow melts, the becks of the Fens swell and water pours down into the valleys of the Vesdre, Amblève and Ourthe. Short frost spells remain possible into May.
Sources and further reading
IRM-KMI: Royal Meteorological Institute of Belgium
Waterinfo: river levels and flood situation in Flanders
Hydrometry in Wallonia: gauges and river flows