Yes

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

Why? Because it's cold. simple as that.
40°F4°C & Partly Cloudy

Wind is 6 mph10 km/h from the SE, gusting to 11 mph18 km/h
April 24
4am40°F4°C6 mph10 km/h SEMostly Clear
5am39°F4°C7 mph10 km/h SEMostly Clear
6am38°F3°C6 mph10 km/h SEMostly Clear
7am37°F3°C7 mph11 km/h SEClear
8am36°F2°C6 mph10 km/h SEClear
9am39°F4°C7 mph10 km/h SEMostly Clear
10am45°F7°C8 mph13 km/h SPartly Cloudy
11am51°F10°C8 mph14 km/h SPartly Cloudy
12pm56°F14°C9 mph15 km/h SPartly Cloudy
1pm61°F16°C11 mph17 km/h SPartly Cloudy
2pm65°F18°C13 mph20 km/h SMostly Cloudy
3pm67°F19°C14 mph22 km/h SPartly Cloudy
DateLowHighWindDayNight
April 2436°F2°C69°F21°C12 mph19 km/h from SMostly ClearMostly Cloudy
April 2546°F8°C71°F22°C10 mph16 km/h from SWMostly CloudyPartly Cloudy
April 2644°F6°C65°F18°C15 mph24 km/h from NPartly CloudyPartly Cloudy
April 2735°F1°C55°F13°C11 mph18 km/h from EMostly ClearMostly Cloudy
April 2832°F-0°C60°F16°C12 mph19 km/h from SEMostly CloudyPartly Cloudy
April 2939°F4°C67°F20°C12 mph19 km/h from SWMostly CloudyPartly Cloudy
April 3044°F7°C65°F18°C15 mph25 km/h from WWindyPartly Cloudy

Yes

Low of 46°F8°C, High of 71°F22°C
Wind: 10 mph16 km/h
Precipitation: None

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