Dendermonde's winters are chilly, with temperatures often below freezing in January and February, but mild spells can bring temperatures up to 19°C. As spring approaches, temperatures rise steadily, with March and April seeing a welcome warmth, averaging around 7°C. Summer is pleasant, with June and July enjoying average highs of 18°C, although August's temperatures are slightly cooler. Autumn brings a return to milder winters, with October's temperatures similar to those in January and February.