Yes

you do need a jacket based on the weather in Tigard, OR, USA 1 second ago

Why? Because it's bitterly cold.
45°F7°C & Mostly Cloudy

Wind is 4 mph6 km/h from the SW, gusting to 10 mph16 km/h
May 7
3am44°F7°C5 mph8 km/h SWPartly Cloudy
4am44°F6°C4 mph7 km/h SWMostly Cloudy
5am43°F6°C4 mph7 km/h SWMostly Cloudy
6am42°F6°C4 mph7 km/h SWMostly Cloudy
7am41°F5°C4 mph6 km/h SWPartly Cloudy
8am40°F5°C4 mph6 km/h SWPartly Cloudy
9am40°F4°C4 mph6 km/h SWPartly Cloudy
10am42°F5°C4 mph6 km/h SWPartly Cloudy
11am44°F7°C4 mph7 km/h SWPartly Cloudy
12pm47°F8°C4 mph7 km/h SWPartly Cloudy
1pm50°F10°C5 mph7 km/h WMostly Cloudy
2pm52°F11°C5 mph8 km/h WMostly Cloudy
DateLowHighWindDayNight
May 644°F7°C57°F14°C4 mph6 km/h from SWRainPartly Cloudy
May 740°F4°C59°F15°C6 mph9 km/h from WMostly CloudyMostly Clear
May 838°F3°C67°F19°C6 mph10 km/h from NMostly ClearClear
May 945°F7°C79°F26°C8 mph12 km/h from NEClearClear
May 1052°F11°C85°F30°C5 mph7 km/h from NClearClear
May 1156°F14°C83°F29°C2 mph3 km/h from NWClearMostly Clear
May 1252°F11°C74°F23°C4 mph6 km/h from NPartly CloudyPartly Cloudy

Yes

Low of 40°F5°C, High of 59°F15°C
Wind: 6 mph9 km/h
Precipitation: 26% rain

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