Throughout September, traveling the Via Francigena from Lausanne to Rome presents a diverse weather experience. The journey initiates in Switzerland with a mix of moderate temperatures, sporadic rain showers, and sunny breaks. Traversing into Italy, the weather exhibits more variability, including intermittent heavy rain showers, sunlit periods, and some overcast conditions. As the month progresses, the weather trends towards drier and sunnier conditions, especially in the southern regions nearing Rome. Climatic extremities such as moderate heat and occasional cool drizzles characterize this significant pilgrim’s path in early autumn.
The weather in Lausanne and its surroundings sees scattered sunny days interrupted by moderate to heavy rain showers. Temperatures range from 12°C to 27°C. Vevey and Aigle mirror this pattern with sunny intermissions among cloudy and rainy days, experiencing highs between 12°C to 25°C.
In Saint-Maurice, rain showers are frequent, but sunny days appear intermittently, with highs reaching 24°C. Martigny and Orsières see rain showers that gradually decrease, allowing for sunny spells, with temperatures peaking at 24°C. Bourg-Saint-Pierre experiences a mix of cloud cover and occasional freezing rain, while at Col du Grand-Saint-Bernard, temperatures drop significantly, encountering light snow.
Étroubles faces frequent patches of rain with sporadic sunny cages that sustain highs from 9°C to 23°C. Aosta has a similar mix, achieving high temperatures of 23°C. Châtillon and Verrès experience intense but brief rain showers, with intervals of sunshine, experiencing highs up to 27°C. Pont-Saint-Martin enjoys a series of sunny days interrupted by occasional heavy rain bursts.
Ivrea transitions between sunny and rainy periods, with highs around 25°C. Similarly, towns like Viverone and Santhià experience variable weather, including rain showers and sunny days. Vercelli and Robbio also witness this changing pattern, with highs reaching up to 31°C.
Weather in Tromello, Pavia, Belgioioso, and Orio Litta consists of periodic sunshine intermixed with occasional rain showers, with highs consistently reaching the mid-20s°C range.
Piacenza and Fiorenzuola d'Arda begin with sunny weather, occasionally interrupted by moderate rain. Fidenza, Medesano, and Sivizzano follow this trend, encountering highs up to 30°C. Days progress as sunny and warm, subsequently seeing intermittent rain showers.
In Pontremoli and Aulla, the weather displays a rainy phase transitioning to sunny spells, with highs running from mid to high 20s°C. Sarzana and Massa show similar patterns, witnessing intermittent rain followed by leisurely sunshine. As travelers pass through Camaiore, consistent sunny periods emerge amidst the occasional rain. Cities like Lucca and San Miniato continue this sunny trend, observing highs creeping up to 28°C.
The weather in Lazio, starting at Acquapendente, shows short-lived rain showers with transitioning towards periodical sunshine. Bolsena and Montefiascone undergo the same weather changes, experiencing highs around the mid-20s°C. Viterbo and Vetralla see gradual moderation in rainfall as sunny days increase. From Sutri onwards to Rome, rain showers decrease, giving way to longer sunny stretches, culminating in the mild warmth enveloping Rome.
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