Yes

you do need a jacket based on the weather in Upwell, Wisbech PE14, UK 1 second ago

Why? Because it's so windy, your hat will probably launch into orbit!
66°F19°C & Windy

Wind is 16 mph26 km/h from the Southwest, gusting to 30 mph49 km/h
September 17
2pm66°F19°C16 mph26 km/h SouthwestWindy
3pm66°F19°C16 mph25 km/h SouthwestWindy
4pm65°F18°C16 mph26 km/h SouthwestWindy
5pm65°F18°C16 mph25 km/h SouthwestWindy
6pm65°F18°C15 mph24 km/h SouthwestWindy
7pm64°F18°C14 mph23 km/h SouthwestCloudy
8pm64°F18°C13 mph22 km/h SouthwestCloudy
9pm63°F17°C13 mph21 km/h SouthwestCloudy
10pm63°F17°C12 mph20 km/h SouthwestCloudy
11pm63°F17°C12 mph20 km/h SouthwestCloudy
September 18
12am62°F17°C12 mph20 km/h SouthwestCloudy
1am63°F17°C12 mph19 km/h SouthwestCloudy
DateLowHighWindDayNight
September 1652°F11°C67°F20°C16 mph25 km/h from SouthwestRainCloudy
September 1762°F17°C72°F22°C16 mph26 km/h from SouthwestWindyMostly Cloudy
September 1860°F15°C76°F25°C12 mph19 km/h from SouthwestPartly CloudyPartly Cloudy
September 1956°F13°C73°F23°C9 mph14 km/h from SouthDrizzleDrizzle
September 2049°F10°C60°F16°C15 mph24 km/h from NorthwestRainDrizzle
September 2147°F8°C60°F15°C16 mph25 km/h from NorthDrizzlePartly Cloudy
September 2246°F8°C60°F15°C15 mph24 km/h from NortheastMostly CloudyThunderstorms

No

Low of 63°F17°C, High of 73°F23°C
Wind: 16 mph26 km/h
Precipitation: None

Support This Page