If you're walking the Via Jacobi, you can usually expect temperatures from around -7°C to 18°C, with a common average of 10°C-14°C.
In Konstanz, where the route starts, the weather can be sunny or rainy. Temperatures usually are around 12°C and can go as low as 3°C.
As you move to Märstetten, Fischingen, and Gibswil, you may see a mix of sunny and cloudy days, with some rain. Temperatures there usually go from 1°C-2°C up to 10°C-14°C.
When you're in the middle part of the journey - from Rapperswil to Brunnen - you may experience different weather. It can be sunny, rainy, and snowing, with temperatures getting as low as 1°C. Einsiedeln can get very cold with a low of -7°C.
As you reach Buochs and Flüeli-Ranft, you'll need protection from the sun and rain. The weather can be sunny or cloudy with some rain. Temperatures here are quite warm with highs of about 13°C.
The last part of the journey from Lungern to Genève has temperatures from 9°C to 18°C. You can expect a mix of sunshine and light rain, with some heavier showers. Genève, at the end of your journey, tends to be warm with highs of 18°C.
Throughout the whole journey, you can expect about 2-3mm of rain per day, sometimes reaching up to 6.7mm. While rain is normal on this trek, it's usually not too heavy.
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