Summer days are usually moderately warm and agreeable, with temperatures between , occasionally rising above , with a fair amount of sunshine. Some years have even witnessed some unusual long periods of harsh summer weather, such as the heat wave of 2003 where temperatures exceeded for weeks, reaching on some days and rarely even cooling down at night. Spring and Fall have rather warm days and fresh nights, but remain quite unstable. Winter days are cold but generally above freezing, at around ; sunshine is usually scarce. Light night frosts are common as the temperature often falls below . Snowfall has been rare in the past decade but happens in some winters, such as 2009–10, with unusually cold weather: much of Europe had heavy snowfall and record-low temperatures. The most recent warmest winters recorded were in 1989–90, 1994–95, 2006–07 and 2013–14. The Arras region (and most of Northern Europe) had remarkably warm and sunny weather in the winter of 2013–14.