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 2 mph4 km/h from the North, gusting to 3 mph5 km/h
| September 17 | ||||
| 7am | 74°F24°C | 2 mph4 km/h East | Clear | |
| 8am | 73°F23°C | 2 mph4 km/h East | Partly Cloudy | |
| 9am | 72°F22°C | 3 mph5 km/h Northeast | Mostly Cloudy | |
| 10am | 71°F22°C | 4 mph6 km/h East | Cloudy | |
| 11am | 75°F24°C | 2 mph3 km/h East | Cloudy | |
| 12pm | 79°F26°C | 2 mph2 km/h South | Cloudy | |
| 1pm | 82°F28°C | 4 mph6 km/h Southwest | Mostly Cloudy | |
| 2pm | 85°F30°C | 6 mph9 km/h Southwest | Mostly Cloudy | |
| 3pm | 88°F31°C | 7 mph12 km/h Southwest | Cloudy | |
| 4pm | 89°F32°C | 8 mph14 km/h Southwest | Cloudy | |
| 5pm | 89°F32°C | 9 mph14 km/h Southwest | Cloudy | |
| 6pm | 88°F31°C | 9 mph14 km/h Southwest | Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 17 | 71°F22°C | 89°F32°C | 6 mph10 km/h from Southwest | Cloudy | Thunderstorms |
| September 18 | 69°F20°C | 82°F28°C | 3 mph5 km/h from South | Rain | Drizzle |
| September 19 | 68°F20°C | 84°F29°C | 4 mph7 km/h from Southwest | Mostly Clear | Clear |
| September 20 | 67°F20°C | 88°F31°C | 4 mph7 km/h from Southwest | Clear | Mostly Clear |
| September 21 | 70°F21°C | 87°F31°C | 4 mph6 km/h from Southwest | Partly Cloudy | Mostly Clear |
| September 22 | 72°F22°C | 92°F33°C | 5 mph7 km/h from South | Mostly Clear | Clear |
| September 23 | 73°F23°C | 88°F31°C | 5 mph9 km/h from Southwest | Clear | Clear |
No
Low of 69°F21°C, High of 82°F28°CWind: 3 mph5 km/h
Precipitation: 60% rain