Yes

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

Why? Because a little drizzle out and it's so windy, your hat is now someone else's problem, two cities away!
63°F17°C & Drizzle

Wind is 17 mph27 km/h from the South, gusting to 30 mph48 km/h
September 9
9am63°F17°C16 mph26 km/h SouthWindy
10am63°F17°C16 mph26 km/h SouthDrizzle
11am62°F17°C16 mph26 km/h SouthDrizzle
12pm62°F17°C16 mph25 km/h SouthDrizzle
1pm61°F16°C14 mph23 km/h SouthRain
2pm60°F15°C14 mph22 km/h SouthRain
3pm59°F15°C15 mph24 km/h SoutheastDrizzle
4pm59°F15°C15 mph24 km/h SouthDrizzle
5pm59°F15°C14 mph23 km/h SoutheastRain
6pm59°F15°C14 mph22 km/h SouthDrizzle
7pm58°F15°C12 mph20 km/h SouthDrizzle
8pm58°F14°C9 mph15 km/h SouthDrizzle
DateLowHighWindDayNight
September 851°F10°C63°F17°C13 mph20 km/h from SouthRainRain
September 955°F13°C65°F18°C10 mph17 km/h from SouthwestDrizzleMostly Clear
September 1052°F11°C62°F17°C16 mph26 km/h from WestDrizzleMostly Clear
September 1151°F10°C62°F17°C14 mph23 km/h from WestDrizzleDrizzle
September 1250°F10°C63°F17°C15 mph23 km/h from WestDrizzleRain
September 1353°F11°C67°F19°C18 mph30 km/h from SouthwestRainWindy
September 1454°F12°C64°F18°C19 mph31 km/h from SouthwestWindyMostly Clear

Yes

Low of 55°F13°C, High of 65°F19°C
Wind: 10 mph17 km/h
Precipitation: 76% rain

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