Yes

you do need a jacket based on the weather in Regina, SK, Canada 1 second ago

Why? Because it's not very warm out!
51°F11°C & Clear

Wind is 5 mph8 km/h from the North, gusting to 9 mph15 km/h
September 17
3am51°F11°C5 mph8 km/h NorthClear
4am50°F10°C5 mph9 km/h NorthMostly Clear
5am50°F10°C6 mph10 km/h NorthMostly Clear
6am49°F10°C6 mph9 km/h NorthMostly Clear
7am49°F9°C6 mph9 km/h NorthMostly Clear
8am49°F9°C5 mph8 km/h NorthMostly Clear
9am48°F9°C4 mph7 km/h NorthMostly Clear
10am52°F11°C5 mph8 km/h NorthMostly Clear
11am56°F13°C6 mph9 km/h NortheastPartly Cloudy
12pm60°F15°C6 mph10 km/h NortheastPartly Cloudy
1pm63°F17°C7 mph12 km/h NortheastPartly Cloudy
2pm65°F18°C8 mph13 km/h NortheastPartly Cloudy
DateLowHighWindDayNight
September 1748°F9°C68°F20°C8 mph13 km/h from NortheastPartly CloudyPartly Cloudy
September 1853°F12°C64°F18°C10 mph16 km/h from SoutheastCloudyMostly Cloudy
September 1950°F10°C67°F19°C7 mph10 km/h from SoutheastMostly CloudyPartly Cloudy
September 2051°F10°C72°F22°C5 mph8 km/h from SouthMostly ClearMostly Clear
September 2155°F13°C80°F26°C11 mph17 km/h from SouthwestMostly ClearPartly Cloudy
September 2252°F11°C71°F21°C12 mph20 km/h from WestMostly ClearMostly Clear
September 2351°F11°C69°F21°C12 mph19 km/h from WestClearClear

Yes

Low of 53°F12°C, High of 64°F18°C
Wind: 10 mph16 km/h
Precipitation: 26% rain

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