Yes

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

Why? Because it's super windy outside!
65°F18°C & Windy

Wind is 16 mph25 km/h from the West, gusting to 31 mph50 km/h
May 25
10am65°F18°C16 mph25 km/h WestWindy
11am65°F18°C15 mph25 km/h WestWindy
12pm64°F18°C15 mph24 km/h WestWindy
1pm63°F17°C15 mph24 km/h WestMostly Cloudy
2pm61°F16°C14 mph23 km/h WestMostly Cloudy
3pm59°F15°C13 mph21 km/h WestMostly Cloudy
4pm58°F14°C13 mph20 km/h WestPartly Cloudy
5pm56°F13°C12 mph20 km/h WestMostly Clear
6pm54°F12°C11 mph18 km/h WestMostly Clear
7pm53°F12°C11 mph17 km/h WestClear
8pm52°F11°C10 mph16 km/h WestClear
9pm51°F11°C10 mph15 km/h WestMostly Clear
DateLowHighWindDayNight
May 2453°F12°C65°F18°C13 mph21 km/h from WestPartly CloudyPartly Cloudy
May 2550°F10°C62°F17°C13 mph21 km/h from SouthwestMostly CloudyDrizzle
May 2655°F13°C62°F17°C13 mph21 km/h from SouthwestRainDrizzle
May 2755°F13°C65°F19°C12 mph19 km/h from WestMostly CloudyMostly Cloudy
May 2853°F12°C70°F21°C12 mph20 km/h from SouthwestDrizzleMostly Cloudy
May 2956°F13°C70°F21°C10 mph16 km/h from WestMostly CloudyPartly Cloudy
May 3055°F13°C70°F21°C7 mph12 km/h from SouthMostly CloudyPartly Cloudy

Yes

Low of 50°F10°C, High of 62°F17°C
Wind: 13 mph21 km/h
Precipitation: 25% rain

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