Yes

you do need a jacket based on the weather in Crans-Montana, Switzerland 1 second ago

Why? Because the cold's there, but it's just a reminder, not an invasion!
42°F5°C & Clear

Wind is 1 mph1 km/h from the North, gusting to 4 mph7 km/h
November 8
6pm40°F5°C1 mph2 km/h NortheastMostly Clear
7pm39°F4°C1 mph1 km/h NorthMostly Clear
8pm38°F4°C1 mph2 km/h NortheastMostly Clear
9pm37°F3°C1 mph2 km/h NorthMostly Clear
10pm37°F3°C1 mph2 km/h NorthMostly Clear
11pm36°F2°C1 mph2 km/h NorthPartly Cloudy
November 9
12am36°F2°C1 mph2 km/h NorthwestMostly Clear
1am35°F2°C1 mph2 km/h NorthMostly Clear
2am34°F1°C1 mph2 km/h NortheastMostly Clear
3am34°F1°C1 mph2 km/h NortheastMostly Clear
4am34°F1°C1 mph2 km/h NortheastMostly Clear
5am34°F1°C1 mph2 km/h NortheastMostly Clear
DateLowHighWindDayNight
November 735°F2°C49°F9°C2 mph3 km/h from WestClearMostly Clear
November 834°F1°C45°F7°C2 mph3 km/h from WestPartly CloudyMostly Clear
November 934°F1°C48°F9°C2 mph3 km/h from SoutheastPartly CloudyMostly Cloudy
November 1035°F2°C49°F9°C1 mph2 km/h from EastMostly ClearPartly Cloudy
November 1138°F3°C52°F11°C3 mph5 km/h from EastMostly ClearPartly Cloudy
November 1239°F4°C55°F13°C3 mph4 km/h from EastMostly ClearMostly Cloudy
November 1341°F5°C53°F11°C5 mph8 km/h from EastPartly CloudyPartly Cloudy

Yes

Low of 34°F1°C, High of 45°F7°C
Wind: 2 mph3 km/h
Precipitation: None

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