No
you don't need a jacket based on the weather in Rancho Cucamonga, CA, USA 1 second ago
75°F24°C & Clear
Wind is 1 mph2 km/h from the Southwest, gusting to 8 mph13 km/h
| September 8 | ||||
| 2am | 74°F24°C | 2 mph3 km/h West | Clear | |
| 3am | 73°F23°C | 2 mph4 km/h Northwest | Clear | |
| 4am | 71°F22°C | 2 mph3 km/h Northeast | Clear | |
| 5am | 70°F21°C | 2 mph3 km/h North | Clear | |
| 6am | 69°F20°C | 4 mph6 km/h Northeast | Clear | |
| 7am | 68°F20°C | 4 mph7 km/h Northeast | Clear | |
| 8am | 66°F19°C | 4 mph6 km/h Northeast | Clear | |
| 9am | 66°F19°C | 3 mph5 km/h North | Clear | |
| 10am | 66°F19°C | 3 mph5 km/h North | Clear | |
| 11am | 70°F21°C | 2 mph4 km/h North | Clear | |
| 12pm | 75°F24°C | 2 mph4 km/h South | Clear | |
| 1pm | 79°F26°C | 4 mph6 km/h Southwest | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 7 | 68°F20°C | 94°F35°C | 7 mph11 km/h from Southwest | Clear | Clear |
| September 8 | 65°F18°C | 89°F32°C | 7 mph11 km/h from Southwest | Clear | Clear |
| September 9 | 62°F17°C | 83°F28°C | 6 mph10 km/h from Southwest | Clear | Mostly Clear |
| September 10 | 61°F16°C | 79°F26°C | 6 mph9 km/h from Southwest | Mostly Clear | Mostly Clear |
| September 11 | 60°F16°C | 78°F25°C | 5 mph8 km/h from Southwest | Mostly Clear | Mostly Clear |
| September 12 | 61°F16°C | 80°F27°C | 5 mph8 km/h from Southwest | Mostly Clear | Clear |
| September 13 | 63°F17°C | 85°F29°C | 5 mph9 km/h from Southwest | Clear | Clear |
No
Low of 65°F19°C, High of 89°F32°CWind: 7 mph11 km/h
Precipitation: None