ZURICH. Sunday starts under widespread high fog on the northern side of the Alps, and MeteoSwiss expects the day to stay largely dry away from the mountains. A bise freshens through the day and lifts the fog deck. Along the Alps a little precipitation is not ruled out. South of the Alps, and in the Engadin, low cloud in places gives way to a largely sunny Sunday.
That is the official picture, and it is a quieter one than a travelling weekend sometimes gets. The plateau is grey at breakfast and brighter later, if the bise does the work MeteoSwiss has forecast. The south does not have to wait. Valais sits with the west of the country: fog where the deck lies, sunshine above it and in the valleys the fog does not reach.
What it means on the road
All Saints’ Day is excursion traffic even when the sky is dull. The A1, the A2 and the A3 will carry people toward cities and toward the mountains, and the fog is the hazard that matters more than a storm. Visibility on the plateau in the morning, and on valley floors, is the reason to leave extra time. Higher up, any precipitation that does fall along the Alps can turn wintry. Drivers heading for passes should treat the morning forecast as a reason to check the road, not as a reason to assume it is closed.
The same fog is the week’s climate story in miniature. Parliament spent last week arguing that the federal heat plan was too thin after a record summer. Sunday is the other Swiss season: a grey lid on the Mittelland, sun on the peaks, and a wind that decides which of the two you get. It will not refill a reservoir. It will decide whether Zurich sees the sun before lunch.
The pattern, not a single number
MeteoSwiss has described the shape of the day rather than a single national high, and this report will not invent one. Fog, a rising bise, dry weather for most places, a chance of a little rain or snow along the Alps, and a brighter south: that is the forecast for 1 November 2026. For the cities on the northern plateau, morning plans belong under the fog. Afternoon plans can wait for the wind.
A Sunday paper that leads on a riot and a fuel plan still owes readers the sky. This is it, from the federal weather office, and it is the version worth using if a social-media forecast and the official one disagree. The official one is fog first, then the bise.