Merksem's winters are mild, with temperatures rarely dropping below freezing point, but not uncommonly reaching as low as -9°C in February. As spring approaches, temperatures gradually rise, with April and May often seeing highs above 20°C. Summer months bring warm to hot weather, with June and July averaging highs around 25-30°C, although occasional cooler days can still occur. Autumn is generally cool, with September and October experiencing lows near or below 5°C, while winters return with temperatures fluctuating between -5°C and 15°C.