Yes
you do need a jacket based on the weather in Diamond Bar, CA, USA 25 minutes ago
Why? Because it's cold enough that makes you wish you had a hat, but you're still too proud to admit it!
50°F10°C & Clear
Wind is 6 mph10 km/h from the East, gusting to 8 mph13 km/h
| January 16 | ||||
| 4am | 49°F9°C | 7 mph12 km/h East | Clear | |
| 5am | 48°F9°C | 7 mph11 km/h East | Clear | |
| 6am | 47°F8°C | 6 mph10 km/h East | Clear | |
| 7am | 47°F8°C | 6 mph10 km/h East | Clear | |
| 8am | 46°F8°C | 6 mph10 km/h East | Clear | |
| 9am | 46°F8°C | 6 mph10 km/h East | Clear | |
| 10am | 44°F7°C | 5 mph8 km/h East | Clear | |
| 11am | 47°F8°C | 5 mph7 km/h East | Clear | |
| 12pm | 54°F12°C | 3 mph5 km/h East | Clear | |
| 1pm | 59°F15°C | 2 mph4 km/h Southeast | Clear | |
| 2pm | 63°F17°C | 3 mph5 km/h Southwest | Clear | |
| 3pm | 65°F18°C | 5 mph8 km/h Southwest | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| January 16 | 44°F7°C | 66°F19°C | 6 mph9 km/h from Southwest | Clear | Mostly Clear |
| January 17 | 43°F6°C | 60°F15°C | 4 mph7 km/h from Southwest | Mostly Clear | Mostly Clear |
| January 18 | 44°F7°C | 62°F17°C | 4 mph6 km/h from Southwest | Clear | Mostly Clear |
| January 19 | 42°F6°C | 58°F15°C | 4 mph6 km/h from Southwest | Partly Cloudy | Mostly Cloudy |
| January 20 | 44°F7°C | 67°F19°C | 4 mph6 km/h from Northeast | Mostly Clear | Clear |
| January 21 | 43°F6°C | 70°F21°C | 5 mph8 km/h from North | Clear | Clear |
| January 22 | 40°F4°C | 70°F21°C | 4 mph6 km/h from Southwest | Clear | Clear |
Yes
Low of 44°F7°C, High of 65°F19°CWind: 6 mph9 km/h
Precipitation: None