The scattered showers on Halloween may cause minor disruptions during the day, particularly for outdoor activities. However, the rain is expected to clear by evening, allowing for better conditions for trick-or-treating. Cooler temperatures overnight may require warm clothing for those staying out late. The heatwave on Sunday and Tuesday could bring unseasonably warm conditions, which may be a relief for some but could also lead to increased pollen levels or minor discomfort for those sensitive to warmer weather.