Lyon experiences a temperate continental climate with four distinct seasons, sitting at the confluence of the Rhône and Saône rivers where Alpine and Mediterranean influences collide.
Rain falls fairly evenly throughout the year with no true dry season, meaning a compact umbrella or waterproof jacket earns its keep in any luggage.
Summers reach 27-30°C while winters hover around 3-7°C, though the Bise wind from the north can make it feel considerably colder than the thermometer suggests.
The city's position between river valleys creates a microclimate prone to fog in autumn and winter, along with occasional humidity spikes that make layering more sensible than bulk.
Cobblestones dominate the Vieux Lyon and Presqu'île, so sturdy walking shoes with actual grip matter more here than in most French cities.