Bellinzona's winters are cold and snowy, with temperatures often below freezing, averaging around -7°C in January. Spring is a slow warming period, with temperatures gradually rising above 0°C, but still quite cool, averaging around -1°C in April. Summers are mild and pleasant, with average highs ranging from 11 to 28°C, although occasional cooler days can occur. Autumn brings a return to cooler temperatures, with averages dipping below 10°C by October. Winters can be cold and icy, with some months experiencing sub-zero temperatures, while others see slightly warmer spells.