Winters in Ashburn are typically cold, with temperatures often below freezing and averaging around 2°C. Spring brings a gradual warming trend, with March being the first month to see significant increases in temperature, reaching averages of 9°C by the end of the month. Summer months are warm, with July and August seeing average highs around 25°C, but with occasional heatwaves pushing temperatures into the mid-30s. Autumn is generally mild, with October and November averaging around 7°C, before cooling off again in December.