The Via Francigena from Calais to Lausanne takes you through a variety of weather conditions typical for this part of Europe. Beginning in Calais and moving through Northern France, you can expect cool temperatures in May with average highs around 12-15°C and lows around 8-9°C. Rain is common, often appearing as patchy rain or heavier showers, so be prepared for a wet start with average precipitation around 1.4-2.9 mm/day. Cloudy and overcast conditions are frequent, though sunny days occasionally break through.
As you progress southward, the temperature gradually rises, reaching average highs of 18-22°C by the time you near the Swiss border. Nights remain cool with lows ranging between 10-13°C. Rain continues to be a consistent feature, with moderate to heavy rain showers being recurrent along the route, reflected in increased precipitation up to 6.0 mm/day in some areas. Despite the prevalent rain, sunny days become more frequent towards the southern end of the route, especially as you approach Lausanne.
Overall, the journey from Calais to Lausanne via the Via Francigena sees a gradual transition from cooler, cloudier weather in the north to slightly warmer and marginally drier conditions as you approach Switzerland, though rain remains a persistent companion throughout the trek.
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