No
you don't need a jacket based on the weather in Rancho Cucamonga, CA, USA 1 second ago
63°F17°C & Mostly Cloudy
Wind is 2 mph4 km/h from the Northwest, gusting to 6 mph9 km/h
| September 10 | ||||
| 8am | 63°F17°C | 3 mph4 km/h West | Mostly Cloudy | |
| 9am | 63°F17°C | 3 mph5 km/h West | Mostly Cloudy | |
| 10am | 63°F17°C | 2 mph3 km/h Southwest | Mostly Cloudy | |
| 11am | 64°F18°C | 2 mph3 km/h Southwest | Mostly Cloudy | |
| 12pm | 66°F19°C | 3 mph5 km/h South | Partly Cloudy | |
| 1pm | 68°F20°C | 3 mph6 km/h South | Partly Cloudy | |
| 2pm | 71°F22°C | 4 mph6 km/h South | Mostly Clear | |
| 3pm | 74°F24°C | 5 mph9 km/h Southwest | Mostly Clear | |
| 4pm | 77°F25°C | 7 mph11 km/h Southwest | Clear | |
| 5pm | 78°F26°C | 9 mph14 km/h Southwest | Clear | |
| 6pm | 79°F26°C | 10 mph16 km/h Southwest | Clear | |
| 7pm | 78°F26°C | 10 mph16 km/h Southwest | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 10 | 63°F17°C | 79°F26°C | 6 mph10 km/h from Southwest | Mostly Clear | Mostly Clear |
| September 11 | 59°F15°C | 80°F26°C | 5 mph9 km/h from Southwest | Mostly Clear | Mostly Clear |
| September 12 | 59°F15°C | 79°F26°C | 5 mph9 km/h from Southwest | Mostly Clear | Mostly Clear |
| September 13 | 60°F16°C | 83°F28°C | 5 mph9 km/h from Southwest | Clear | Clear |
| September 14 | 63°F17°C | 86°F30°C | 5 mph8 km/h from Southwest | Clear | Clear |
| September 15 | 65°F18°C | 88°F31°C | 5 mph8 km/h from Southwest | Clear | Clear |
| September 16 | 68°F20°C | 92°F34°C | 5 mph8 km/h from Southwest | Clear | Clear |
No
Low of 59°F15°C, High of 80°F27°CWind: 5 mph9 km/h
Precipitation: None