Yes

you do need a jacket based on the weather in Northampton NN5, UK 1 second ago

Why? Because a jacket will keep you cozy, but you won't break a seat!
58°F15°C & Partly Cloudy

Wind is 3 mph5 km/h from the Southwest, gusting to 7 mph11 km/h
August 11
12am58°F14°C3 mph5 km/h SouthwestPartly Cloudy
1am57°F14°C3 mph5 km/h SouthMostly Cloudy
2am59°F15°C2 mph4 km/h SouthMostly Cloudy
3am63°F17°C2 mph4 km/h SouthwestPartly Cloudy
4am69°F20°C3 mph4 km/h SouthMostly Cloudy
5am73°F23°C3 mph6 km/h SoutheastMostly Cloudy
6am75°F24°C5 mph8 km/h SoutheastMostly Cloudy
7am77°F25°C5 mph8 km/h SoutheastMostly Cloudy
8am79°F26°C5 mph7 km/h SoutheastMostly Cloudy
9am81°F27°C4 mph7 km/h SoutheastMostly Cloudy
10am81°F27°C4 mph7 km/h SoutheastCloudy
11am82°F28°C4 mph7 km/h SoutheastCloudy
DateLowHighWindDayNight
August 1057°F14°C82°F28°C4 mph7 km/h from SoutheastMostly CloudyMostly Cloudy
August 1163°F17°C86°F30°C8 mph13 km/h from EastMostly ClearMostly Clear
August 1263°F17°C83°F28°C9 mph15 km/h from SouthMostly CloudyMostly Clear
August 1360°F16°C79°F26°C9 mph15 km/h from WestPartly CloudyPartly Cloudy
August 1461°F16°C81°F27°C6 mph10 km/h from NorthPartly CloudyMostly Clear
August 1560°F16°C79°F26°C6 mph10 km/h from NortheastMostly ClearMostly Clear
August 1659°F15°C76°F25°C8 mph13 km/h from NortheastMostly ClearMostly Clear

No

Low of 63°F17°C, High of 86°F30°C
Wind: 8 mph13 km/h
Precipitation: None

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