In May, the Via Francigena from Lausanne to Rome experiences varied weather across its different regions. The month generally sees a mix of sunshine and rainfall, with temperatures ranging from cool in the early part of the trail to warm as one approaches Rome. Cloud cover and occasional showers are common, transitioning into sunnier days and warmer climates as the trail progresses southward through Italy. High temperatures increase notably as you travel through regions like Piedmont and Lazio, while rainfall is also markedly varied, ranging from light drizzles to heavier showers particularly in northern and central stretches.
The beginning of the trail in Lausanne presents partly cloudy weather interspersed with showers, with temperatures ranging from 7°C to 18°C. Arrival in Vevey sees occasional heavy rain showers, with daily highs reaching up to 18°C. Moving to Aigle, the weather becomes a mix of sunny periods and rain, with high temperatures fluctuating between 8°C and 16°C.
In Saint-Maurice, the journey continues with moderate rain and occasional sunny bursts, experiencing cooler temperatures between 0°C to 18°C. Martigny offers similar weather patterns with highs up to 14°C, followed by Orsières, where further rain and occasional cloudiness persist. At Bourg-Saint-Pierre and Col du Grand-Saint-Bernard, precipitation includes rain and snow, with temperatures dropping to lows of -6°C.
Etroubles introduces warmer temperatures, with light snow at times mixed with rain, while Aosta moves between sunny spells and heavy rain, temperatures peaking at 19°C. Châtillon experiences heavy rain showers contrasting with short sunny spells. Heading toward Verrès and Pont-Saint-Martin reveals similar patterns, including occasional heavy showers.
Entering Ivrea and Viverone, frequent rain showers lead to picturesque sunny interludes, temperatures rising notably to the mid-20s. As you proceed through Santhià and Vercelli, sunnier weather dominates but with sporadic rain, making way for warmer, steadier sun as seen in Robbio.
In Tromello, heavy showers stand out amid sunnier days, while Pavia's climate balances between sunny and rainy, with temperatures reaching a height of 31°C. Belgioioso to Orio Litta continues this sun-rain pattern, marking the transition into warmer climates as the trail progresses.
Piacenza through Fiorenzuola d'Arda initially exhibits sunny spells before periods of rain. Fidenza's weather mirrors this variability, with warmer interludes giving way to brief showers, while Medesano to Berceto reflects more of the same, consistent with fairer weather transitions.
From Pontremoli through Sarzana, conditions improve significantly, interspersed with brief rain but more consistent sunshine, a pattern that continues through Massa to Lucca. Temperatures climb steadily, reaching high 20s in places like San Miniato and Gambassi Terme, accompanied by occasional rain.
In Acquapendente, sunny weather takes precedence, with occasional rain showers peeking through. As the trail nears Rome, such as in Bolsena, Viterbo, and Sutri, the warmth becomes a constant, day temperatures often crossing 30°C, while rain becomes rare. Finally, in Rome, sunny weather dominates with very occasional mild showers to round off May's weather spectrum.
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