Dietikon's winters are cold and variable, with temperatures often below freezing but occasionally rising into the mid-teens. Spring arrives in late March or early April, bringing steady warming and increasingly mild temperatures, often reaching up to 25 degrees Celsius by May. Summer months are generally warm but not hot, with highs rarely exceeding 32 degrees Celsius and nighttime lows ranging from 7 to 9 degrees Celsius. Autumn is similar to spring in terms of temperature fluctuations, with a gradual cooling trend that continues through October before the onset of winter chill again.