Yes

you do need a jacket based on the weather in Emsworth, UK 1 second ago

Why? Because it's cold enough that makes you wish you had a hat, but you're still too proud to admit it!
37°F3°C & Clear

Wind is 4 mph7 km/h from the Northeast, gusting to 6 mph10 km/h
January 11
7am37°F3°C4 mph7 km/h NortheastClear
8am38°F3°C4 mph7 km/h NortheastClear
9am39°F4°C4 mph7 km/h NortheastClear
10am38°F3°C5 mph7 km/h NortheastClear
11am35°F2°C4 mph6 km/h NortheastClear
12pm33°F0°C4 mph6 km/h NortheastClear
1pm32°F-0°C4 mph7 km/h NortheastMostly Clear
2pm31°F-1°C5 mph8 km/h NortheastPartly Cloudy
3pm31°F-1°C5 mph8 km/h NortheastMostly Cloudy
4pm31°F-1°C4 mph7 km/h NortheastMostly Cloudy
5pm31°F-1°C4 mph7 km/h NortheastMostly Cloudy
6pm31°F-1°C4 mph7 km/h NortheastMostly Cloudy
DateLowHighWindDayNight
January 1029°F-2°C39°F4°C4 mph6 km/h from NortheastClearMostly Cloudy
January 1131°F-1°C42°F5°C4 mph6 km/h from EastMostly CloudyPartly Cloudy
January 1238°F3°C43°F6°C9 mph14 km/h from SouthwestMostly CloudyMostly Cloudy
January 1338°F3°C49°F9°C6 mph9 km/h from WestPartly CloudyMostly Cloudy
January 1441°F5°C49°F9°C4 mph7 km/h from WestPartly CloudyMostly Clear
January 1537°F3°C48°F9°C6 mph9 km/h from SouthwestPartly CloudyPartly Cloudy
January 1640°F4°C47°F8°C10 mph16 km/h from SouthwestMostly CloudyMostly Cloudy

Yes

Low of 31°F-1°C, High of 42°F6°C
Wind: 4 mph6 km/h
Precipitation: None

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