Enfolded deep in the Rhone valley, Lyon is subjected to cold winds from the Alps and warm breezes from the Mediterranean.
Four seasons characterise its climate: hot summers, mild autumns, cold winters and a bountiful spring. Rain is another characteristic: precipitation may come at any time of the year.
Lyon is classed as borderline Oceanic and Humid Subtropical (Koppen Cfb/Cfa). Winters are cooler than much of the rest of France due to its more inland position, but generally not cold, averaging 3.2 °C (37.8 °F) in January. Summers are very warm, averaging 21.3 °C (70.3 °F) in July. Precipitation is adequate year-round, at an average of 840 millimetres (33.1 in), but the winter months are the driest.