Yes

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

Why? Because it's on the windy side!
66°F19°C & Cloudy

Wind is 11 mph17 km/h from the Northwest, gusting to 21 mph34 km/h
July 2
9am66°F19°C11 mph18 km/h NorthwestCloudy
10am70°F21°C11 mph18 km/h NorthwestMostly Cloudy
11am72°F22°C12 mph20 km/h NorthwestPartly Cloudy
12pm73°F23°C13 mph22 km/h NorthwestMostly Clear
1pm72°F22°C14 mph22 km/h NorthwestClear
2pm70°F21°C13 mph21 km/h NorthwestClear
3pm67°F19°C13 mph20 km/h NorthwestClear
4pm64°F18°C11 mph18 km/h NorthClear
5pm60°F16°C10 mph16 km/h NorthClear
6pm58°F14°C9 mph15 km/h NorthClear
7pm56°F13°C9 mph14 km/h NorthwestClear
8pm54°F12°C8 mph13 km/h NorthwestClear
DateLowHighWindDayNight
July 156°F13°C73°F23°C8 mph14 km/h from NorthwestDrizzleClear
July 251°F11°C72°F22°C7 mph11 km/h from WestPartly CloudyMostly Clear
July 353°F11°C76°F24°C9 mph15 km/h from WestMostly CloudyCloudy
July 459°F15°C70°F21°C13 mph21 km/h from SouthwestMostly CloudyMostly Cloudy
July 558°F14°C69°F21°C11 mph18 km/h from WestMostly CloudyMostly Cloudy
July 654°F12°C66°F19°C12 mph20 km/h from NorthwestDrizzleMostly Clear
July 754°F12°C71°F22°C10 mph15 km/h from NorthwestMostly CloudyPartly Cloudy

Yes

Low of 51°F11°C, High of 73°F23°C
Wind: 7 mph11 km/h
Precipitation: None

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