Yes

you do need a jacket based on the weather in Rohtang La, Himachal Pradesh 1 second ago

Why? Because Jack Frost is nipping at your nose!
26°F-4°C & Clear

Wind is 6 mph9 km/h from the Northeast, gusting to 13 mph21 km/h
October 26
12am26°F-4°C6 mph9 km/h NortheastClear
1am26°F-4°C6 mph9 km/h NortheastClear
2am26°F-3°C6 mph9 km/h NortheastClear
3am30°F-1°C5 mph8 km/h NortheastClear
4am34°F1°C3 mph5 km/h NortheastClear
5am37°F3°C1 mph1 km/h NortheastClear
6am39°F4°C2 mph4 km/h SouthClear
7am41°F5°C3 mph5 km/h SouthClear
8am42°F5°C4 mph7 km/h SouthClear
9am42°F6°C4 mph7 km/h SouthClear
10am41°F5°C4 mph7 km/h SouthClear
11am39°F4°C4 mph6 km/h SouthClear
DateLowHighWindDayNight
October 2526°F-4°C42°F6°C3 mph6 km/h from SoutheastClearClear
October 2626°F-3°C42°F6°C4 mph6 km/h from SoutheastClearClear
October 2726°F-3°C42°F5°C4 mph6 km/h from SoutheastClearClear
October 2827°F-3°C44°F7°C4 mph6 km/h from EastClearClear
October 2930°F-1°C44°F7°C3 mph5 km/h from SoutheastMostly ClearMostly Clear
October 3030°F-1°C45°F7°C3 mph5 km/h from EastClearClear
October 3130°F-1°C44°F7°C3 mph6 km/h from EastClearClear

Yes

Low of 26°F-4°C, High of 42°F6°C
Wind: 4 mph6 km/h
Precipitation: None

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