Yes

you do need a jacket based on the weather in Watford WD24, UK 1 second ago

Why? Because it's so windy, even the squirrels are holding onto branches for dear life!
61°F16°C & Mostly Cloudy

Wind is 12 mph20 km/h from the Southwest, gusting to 25 mph40 km/h
September 13
8am61°F16°C13 mph21 km/h SouthwestMostly Cloudy
9am61°F16°C13 mph20 km/h SouthwestMostly Cloudy
10am60°F16°C11 mph18 km/h SouthwestPartly Cloudy
11am61°F16°C13 mph21 km/h WestPartly Cloudy
12pm60°F16°C13 mph21 km/h WestPartly Cloudy
1pm59°F15°C11 mph18 km/h WestMostly Clear
2pm58°F14°C10 mph17 km/h WestMostly Clear
3pm56°F13°C9 mph14 km/h SouthwestPartly Cloudy
4pm54°F12°C8 mph13 km/h SouthwestMostly Cloudy
5pm53°F12°C8 mph13 km/h SouthwestMostly Cloudy
6pm52°F11°C8 mph12 km/h SouthwestMostly Clear
7pm51°F11°C7 mph12 km/h SouthwestClear
DateLowHighWindDayNight
September 1251°F11°C61°F16°C10 mph16 km/h from SouthwestRainMostly Clear
September 1347°F9°C65°F18°C11 mph18 km/h from SouthRainRain
September 1454°F12°C63°F17°C20 mph33 km/h from SouthwestDrizzleWindy
September 1551°F10°C63°F17°C13 mph22 km/h from WestMostly CloudyRain
September 1653°F12°C68°F20°C15 mph25 km/h from SouthwestRainCloudy
September 1754°F12°C67°F20°C11 mph18 km/h from SouthwestPartly CloudyMostly Clear
September 1848°F9°C66°F19°C6 mph9 km/h from SouthwestMostly ClearPartly Cloudy

Yes

Low of 47°F9°C, High of 64°F18°C
Wind: 11 mph18 km/h
Precipitation: 74% rain

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