No
you don't need a jacket based on the weather in San Bernardino, CA, USA 1 second ago
80°F26°C & Clear
Wind is 6 mph10 km/h from the Southwest, gusting to 12 mph20 km/h
| September 19 | ||||
| 11pm | 79°F26°C | 5 mph8 km/h Southwest | Clear | |
| September 20 | ||||
| 12am | 76°F25°C | 4 mph6 km/h Southwest | Clear | |
| 1am | 75°F24°C | 3 mph5 km/h Southwest | Mostly Clear | |
| 2am | 73°F23°C | 3 mph5 km/h Southwest | Clear | |
| 3am | 72°F22°C | 2 mph4 km/h Southwest | Clear | |
| 4am | 70°F21°C | 2 mph3 km/h Southwest | Clear | |
| 5am | 69°F21°C | 2 mph3 km/h Southwest | Clear | |
| 6am | 68°F20°C | 1 mph2 km/h Northeast | Clear | |
| 7am | 67°F19°C | 2 mph2 km/h Northeast | Clear | |
| 8am | 66°F19°C | 2 mph3 km/h Northeast | Clear | |
| 9am | 65°F18°C | 2 mph3 km/h Northeast | Clear | |
| 10am | 65°F18°C | 2 mph4 km/h Northeast | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 19 | 70°F21°C | 88°F31°C | 3 mph5 km/h from Southwest | Mostly Clear | Clear |
| September 20 | 65°F18°C | 87°F31°C | 3 mph5 km/h from Southwest | Clear | Clear |
| September 21 | 63°F17°C | 84°F29°C | 4 mph6 km/h from Southwest | Partly Cloudy | Mostly Clear |
| September 22 | 63°F17°C | 89°F32°C | 4 mph6 km/h from Southwest | Clear | Clear |
| September 23 | 66°F19°C | 92°F33°C | 4 mph7 km/h from Southwest | Mostly Clear | Mostly Clear |
| September 24 | 69°F21°C | 88°F31°C | 4 mph7 km/h from Southwest | Clear | Clear |
| September 25 | 66°F19°C | 86°F30°C | 4 mph7 km/h from Southwest | Mostly Clear | Partly Cloudy |
No
Low of 64°F18°C, High of 87°F31°CWind: 3 mph5 km/h
Precipitation: None