Yes
you do need a jacket based on the weather in Rancho Cucamonga, CA, USA 1 second ago
Why? Because the cold's there, but it's just a reminder, not an invasion!
44°F7°C & Mostly Clear
Wind is 4 mph6 km/h from the Northwest, gusting to 7 mph11 km/h
| January 18 | ||||
| 2am | 44°F7°C | 4 mph7 km/h Northwest | Mostly Clear | |
| 3am | 44°F7°C | 4 mph6 km/h North | Mostly Clear | |
| 4am | 44°F6°C | 4 mph6 km/h North | Mostly Clear | |
| 5am | 43°F6°C | 4 mph6 km/h North | Mostly Clear | |
| 6am | 43°F6°C | 5 mph8 km/h North | Mostly Clear | |
| 7am | 43°F6°C | 4 mph7 km/h North | Mostly Clear | |
| 8am | 42°F6°C | 3 mph5 km/h North | Partly Cloudy | |
| 9am | 42°F6°C | 3 mph5 km/h North | Mostly Clear | |
| 10am | 42°F6°C | 3 mph5 km/h North | Mostly Clear | |
| 11am | 45°F7°C | 2 mph3 km/h North | Mostly Clear | |
| 12pm | 49°F9°C | 2 mph4 km/h Southeast | Mostly Clear | |
| 1pm | 52°F11°C | 2 mph4 km/h Southeast | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| January 17 | 43°F6°C | 56°F14°C | 3 mph5 km/h from Southwest | Partly Cloudy | Mostly Clear |
| January 18 | 42°F6°C | 62°F17°C | 4 mph6 km/h from West | Clear | Clear |
| January 19 | 44°F7°C | 61°F16°C | 4 mph7 km/h from Southwest | Clear | Mostly Clear |
| January 20 | 43°F6°C | 64°F18°C | 14 mph23 km/h from Northeast | Clear | Clear |
| January 21 | 48°F9°C | 67°F19°C | 5 mph7 km/h from Northeast | Mostly Clear | Mostly Clear |
| January 22 | 52°F11°C | 73°F23°C | 5 mph8 km/h from Northeast | Mostly Clear | Mostly Clear |
| January 23 | 55°F13°C | 71°F22°C | 6 mph9 km/h from Northeast | Mostly Clear | Partly Cloudy |
Yes
Low of 42°F6°C, High of 63°F17°CWind: 4 mph6 km/h
Precipitation: None