Yes

you do need a jacket based on the weather in Kittitas, WA, USA 1 second ago

Why? Because the cold's there, but it's just a reminder, not an invasion!
41°F5°C & Cloudy

Wind is 3 mph5 km/h from the East, gusting to 6 mph10 km/h
October 29
3am40°F5°C3 mph5 km/h EastCloudy
4am40°F4°C4 mph6 km/h EastCloudy
5am40°F4°C4 mph6 km/h EastCloudy
6am39°F4°C3 mph5 km/h EastCloudy
7am40°F5°C4 mph6 km/h SoutheastDrizzle
8am41°F5°C8 mph12 km/h NorthwestRain
9am40°F5°C3 mph6 km/h WestCloudy
10am41°F5°C5 mph7 km/h WestCloudy
11am41°F5°C5 mph9 km/h WestPartly Cloudy
12pm39°F4°C7 mph11 km/h WestClear
1pm38°F3°C6 mph10 km/h WestClear
2pm37°F3°C6 mph10 km/h WestMostly Clear
DateLowHighWindDayNight
October 2829°F-2°C46°F8°C3 mph5 km/h from EastCloudyRain
October 2936°F2°C53°F12°C7 mph12 km/h from WestMostly ClearMostly Clear
October 3032°F-0°C51°F11°C3 mph5 km/h from EastMostly CloudyPartly Cloudy
October 3133°F1°C48°F9°C2 mph3 km/h from SoutheastCloudyCloudy
November 140°F4°C55°F13°C6 mph10 km/h from NorthwestMostly CloudyPartly Cloudy
November 235°F2°C52°F11°C7 mph11 km/h from NorthwestPartly CloudyPartly Cloudy
November 334°F1°C48°F9°C3 mph5 km/h from EastCloudyCloudy

Yes

Low of 36°F2°C, High of 54°F12°C
Wind: 7 mph12 km/h
Precipitation: None

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