Yes
you do need a jacket based on the weather in Rancho Cucamonga, CA, USA 1 second ago
Why? Because it's pretty chilly!
54°F12°C & Cloudy
Wind is 3 mph5 km/h from the North, gusting to 5 mph8 km/h
| January 4 | ||||
| 10pm | 54°F12°C | 4 mph6 km/h North | Mostly Cloudy | |
| 11pm | 53°F12°C | 3 mph5 km/h North | Mostly Cloudy | |
| January 5 | ||||
| 12am | 52°F11°C | 4 mph6 km/h North | Mostly Cloudy | |
| 1am | 51°F11°C | 5 mph7 km/h North | Cloudy | |
| 2am | 51°F11°C | 4 mph7 km/h North | Cloudy | |
| 3am | 50°F10°C | 4 mph7 km/h North | Mostly Cloudy | |
| 4am | 50°F10°C | 5 mph8 km/h North | Mostly Cloudy | |
| 5am | 50°F10°C | 5 mph8 km/h North | Mostly Cloudy | |
| 6am | 49°F10°C | 6 mph9 km/h North | Mostly Cloudy | |
| 7am | 48°F9°C | 6 mph10 km/h North | Mostly Cloudy | |
| 8am | 49°F9°C | 6 mph9 km/h North | Partly Cloudy | |
| 9am | 49°F10°C | 5 mph8 km/h North | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| January 4 | 45°F7°C | 61°F16°C | 3 mph5 km/h from Southwest | Partly Cloudy | Mostly Cloudy |
| January 5 | 48°F9°C | 71°F22°C | 4 mph6 km/h from Northeast | Partly Cloudy | Clear |
| January 6 | 52°F11°C | 71°F22°C | 4 mph6 km/h from West | Mostly Clear | Mostly Clear |
| January 7 | 48°F9°C | 63°F17°C | 13 mph21 km/h from Northeast | Mostly Clear | Windy |
| January 8 | 48°F9°C | 64°F18°C | 14 mph23 km/h from Northeast | Clear | Clear |
| January 9 | 46°F8°C | 70°F21°C | 5 mph9 km/h from Northeast | Clear | Clear |
| January 10 | 50°F10°C | 70°F21°C | 4 mph7 km/h from Northeast | Clear | Clear |
Yes
Low of 48°F9°C, High of 72°F22°CWind: 4 mph6 km/h
Precipitation: None