Yes

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

Why? Because too cold for just a hoodie, too warm for a parka!
40°F4°C & Clear

Wind is 4 mph6 km/h from the South, gusting to 7 mph11 km/h
April 17
1am39°F4°C4 mph6 km/h SouthwestClear
2am40°F5°C3 mph5 km/h SouthClear
3am44°F7°C2 mph3 km/h SouthwestClear
4am48°F9°C2 mph3 km/h WestClear
5am51°F11°C1 mph2 km/h NorthwestClear
6am53°F12°C1 mph1 km/h NorthClear
7am56°F13°C2 mph3 km/h WestMostly Clear
8am57°F14°C4 mph6 km/h SouthwestMostly Clear
9am58°F14°C4 mph6 km/h SouthwestPartly Cloudy
10am59°F15°C4 mph6 km/h SouthwestMostly Cloudy
11am59°F15°C4 mph6 km/h SouthwestMostly Cloudy
12pm59°F15°C3 mph5 km/h SouthwestMostly Cloudy
DateLowHighWindDayNight
April 1639°F4°C59°F15°C3 mph5 km/h from SouthwestPartly CloudyPartly Cloudy
April 1743°F6°C61°F16°C13 mph21 km/h from SoutheastCloudyCloudy
April 1843°F6°C55°F13°C13 mph21 km/h from EastDrizzleMostly Cloudy
April 1941°F5°C57°F14°C9 mph15 km/h from EastMostly CloudyMostly Cloudy
April 2042°F6°C60°F16°C6 mph10 km/h from SoutheastMostly CloudyMostly Cloudy
April 2145°F7°C63°F17°C7 mph11 km/h from SouthwestMostly CloudyMostly Clear
April 2242°F5°C64°F18°C4 mph7 km/h from SoutheastMostly ClearMostly Clear

Yes

Low of 44°F7°C, High of 61°F16°C
Wind: 13 mph21 km/h
Precipitation: None

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