No
you don't need a jacket based on the weather in San Ramon, CA, USA 5 minutes ago
78°F26°C & Mostly Clear
Wind is 6 mph9 km/h from the Southwest, gusting to 9 mph15 km/h
| September 18 | ||||
| 12am | 77°F25°C | 4 mph7 km/h West | Mostly Clear | |
| 1am | 75°F24°C | 4 mph6 km/h Southwest | Partly Cloudy | |
| 2am | 73°F23°C | 4 mph6 km/h Southwest | Partly Cloudy | |
| 3am | 72°F22°C | 3 mph5 km/h Southwest | Mostly Cloudy | |
| 4am | 70°F21°C | 4 mph7 km/h Southwest | Cloudy | |
| 5am | 70°F21°C | 4 mph6 km/h Southwest | Cloudy | |
| 6am | 68°F20°C | 4 mph6 km/h Southwest | Cloudy | |
| 7am | 65°F19°C | 3 mph5 km/h Southwest | Cloudy | |
| 8am | 64°F18°C | 3 mph5 km/h Southwest | Cloudy | |
| 9am | 63°F17°C | 4 mph6 km/h Southwest | Cloudy | |
| 10am | 62°F17°C | 4 mph6 km/h Southwest | Cloudy | |
| 11am | 64°F18°C | 4 mph7 km/h Southwest | Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 17 | 61°F16°C | 95°F35°C | 3 mph5 km/h from West | Clear | Mostly Cloudy |
| September 18 | 62°F17°C | 77°F25°C | 6 mph10 km/h from Southwest | Cloudy | Cloudy |
| September 19 | 61°F16°C | 74°F24°C | 3 mph5 km/h from West | Mostly Cloudy | Partly Cloudy |
| September 20 | 57°F14°C | 79°F26°C | 5 mph8 km/h from West | Mostly Clear | Mostly Clear |
| September 21 | 57°F14°C | 80°F27°C | 4 mph7 km/h from West | Mostly Clear | Clear |
| September 22 | 57°F14°C | 90°F32°C | 3 mph5 km/h from Northwest | Clear | Mostly Clear |
| September 23 | 63°F17°C | 81°F27°C | 4 mph7 km/h from Southwest | Drizzle | Partly Cloudy |
No
Low of 63°F17°C, High of 77°F25°CWind: 6 mph10 km/h
Precipitation: 10% rain