Yes

you do need a jacket based on the weather in Alhambra, CA, USA 1 second ago

Why? Because it's pretty chilly!
58°F14°C & Partly Cloudy

Wind is 2 mph4 km/h from the Southwest, gusting to 12 mph19 km/h
May 13
3am58°F14°C3 mph4 km/h SouthwestMostly Clear
4am56°F14°C4 mph6 km/h EastMostly Clear
5am57°F14°C3 mph6 km/h SouthMostly Cloudy
6am56°F14°C4 mph6 km/h SoutheastMostly Cloudy
7am55°F13°C4 mph7 km/h SouthPartly Cloudy
8am54°F12°C3 mph5 km/h SoutheastMostly Clear
9am53°F12°C3 mph5 km/h EastMostly Clear
10am55°F13°C3 mph5 km/h SoutheastPartly Cloudy
11am57°F14°C4 mph7 km/h SoutheastPartly Cloudy
12pm60°F15°C5 mph8 km/h SoutheastMostly Clear
1pm63°F17°C5 mph8 km/h SoutheastMostly Clear
2pm65°F19°C4 mph7 km/h SouthMostly Clear
DateLowHighWindDayNight
May 1258°F14°C73°F23°C4 mph6 km/h from SouthMostly CloudyPartly Cloudy
May 1353°F12°C71°F22°C6 mph10 km/h from SouthwestMostly ClearMostly Clear
May 1453°F11°C74°F23°C6 mph10 km/h from SouthwestClearMostly Clear
May 1555°F13°C77°F25°C6 mph9 km/h from SouthwestClearMostly Clear
May 1656°F13°C73°F23°C5 mph8 km/h from SouthPartly CloudyMostly Cloudy
May 1757°F14°C66°F19°C5 mph9 km/h from SouthCloudyMostly Cloudy
May 1854°F12°C69°F20°C6 mph10 km/h from SouthPartly CloudyMostly Clear

Yes

Low of 53°F12°C, High of 71°F22°C
Wind: 6 mph10 km/h
Precipitation: None

Support This Page