Yes

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

Why? Because it's not very warm out!
53°F12°C & Mostly Clear

Wind is 9 mph14 km/h from the West, gusting to 17 mph27 km/h
September 16
4am55°F13°C10 mph16 km/h WestMostly Clear
5am57°F14°C12 mph20 km/h WestMostly Clear
6am58°F15°C13 mph21 km/h WestPartly Cloudy
7am60°F15°C14 mph23 km/h WestPartly Cloudy
8am61°F16°C15 mph25 km/h WestWindy
9am61°F16°C16 mph26 km/h WestWindy
10am62°F16°C16 mph25 km/h WestWindy
11am61°F16°C15 mph24 km/h WestPartly Cloudy
12pm60°F16°C13 mph21 km/h WestPartly Cloudy
1pm59°F15°C11 mph17 km/h WestPartly Cloudy
2pm57°F14°C8 mph13 km/h WestMostly Cloudy
3pm55°F13°C6 mph9 km/h WestMostly Cloudy
DateLowHighWindDayNight
September 1550°F10°C62°F16°C13 mph20 km/h from WestPartly CloudyRain
September 1650°F10°C65°F18°C13 mph21 km/h from SouthwestDrizzleMostly Cloudy
September 1752°F11°C65°F18°C14 mph23 km/h from SouthwestRainRain
September 1854°F12°C63°F17°C10 mph17 km/h from SouthwestDrizzleRain
September 1949°F9°C59°F15°C10 mph16 km/h from NorthDrizzleDrizzle
September 2044°F6°C56°F13°C12 mph19 km/h from NortheastPartly CloudyPartly Cloudy
September 2141°F5°C58°F14°C10 mph16 km/h from NortheastPartly CloudyPartly Cloudy

Yes

Low of 50°F10°C, High of 64°F18°C
Wind: 13 mph21 km/h
Precipitation: 85% rain

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