Sittard's winters are chilly, with temperatures often below freezing, especially in January and February. As spring approaches, temperatures gradually warm up, reaching averages around 7-12°C by April and May. Summer is mild, with highs rarely exceeding 30°C, and temperatures consistently above 10°C from June to August. Autumn brings a return to cooler temperatures, but still relatively mild, with averages ranging from 5-16°C in September and October. By winter again, the temperature drops, although not as low as in January and February.