Nijmegen has an oceanic climate (Cfb). It is one of the warmest cities of the Netherlands, especially during summer, when the highest temperatures in the country are usually measured in the triangle Roermond–Nijmegen–Eindhoven. The lack of north–south oriented mountain ranges in Europe make this area prone to sudden shifts in weather, giving the region a semi-continental climate.
Some of the northernmost wineries in the world are found just outside Nijmegen, around Groesbeek, a suburban village south-east of Nijmegen.
During the 2006 European heat wave, closest official weather station Volkel reached a high of 36.7 °C (98.1 °F) on 19 July. The heat wave coincided with that year’s Four Day Marches, which were cancelled after the first day, when two people died of hyperthermia-related causes. Temperatures on that day, 18 July, reached around 36 °C (96.8 °F) in the city.