Yes

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

Why? Because it's so gusty, you’re basically doing accidental parkour!
77°F25°C & Clear

Wind is 11 mph18 km/h from the South, gusting to 21 mph33 km/h
September 19
11am77°F25°C11 mph18 km/h SouthClear
12pm76°F25°C11 mph17 km/h SouthMostly Clear
1pm74°F23°C10 mph16 km/h SouthMostly Clear
2pm71°F22°C9 mph14 km/h SouthMostly Cloudy
3pm69°F20°C8 mph13 km/h SouthMostly Clear
4pm67°F19°C8 mph14 km/h SouthMostly Clear
5pm65°F18°C9 mph14 km/h SouthwestClear
6pm63°F17°C8 mph13 km/h SouthwestPartly Cloudy
7pm62°F17°C8 mph13 km/h SouthwestPartly Cloudy
8pm61°F16°C8 mph12 km/h SouthwestPartly Cloudy
9pm60°F15°C7 mph11 km/h SouthwestPartly Cloudy
10pm58°F15°C7 mph12 km/h SouthwestMostly Cloudy
DateLowHighWindDayNight
September 1859°F15°C77°F25°C9 mph14 km/h from SouthMostly ClearPartly Cloudy
September 1953°F12°C69°F20°C13 mph21 km/h from SouthwestDrizzleDrizzle
September 2047°F8°C57°F14°C10 mph15 km/h from NorthDrizzlePartly Cloudy
September 2143°F6°C58°F14°C12 mph19 km/h from NorthMostly ClearMostly Clear
September 2240°F5°C58°F14°C8 mph12 km/h from NorthPartly CloudyPartly Cloudy
September 2343°F6°C61°F16°C8 mph13 km/h from NortheastMostly CloudyMostly Cloudy
September 2446°F8°C60°F16°C8 mph12 km/h from EastMostly CloudyMostly Cloudy

Yes

Low of 54°F12°C, High of 69°F21°C
Wind: 13 mph21 km/h
Precipitation: 39% rain

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