Lucan's winters are chilly and unpredictable, with temperatures often dropping below freezing in January and February, but rising to mild highs of 12-14°C. By March, the mercury begins to rise steadily, reaching an average high of 17°C by May. Summer months bring warmth, with July being the warmest month, averaging 17°C. Autumn is a gentle transition back to cooler temperatures, while winter returns, albeit with slightly milder conditions than the start of the year.