No
you don't need a jacket based on the weather in San Francisco International Airport (SFO), San Francisco, CA 94128, USA 1 second ago
66°F19°C & Mostly Clear
Wind is 4 mph6 km/h from the Southeast, gusting to 7 mph12 km/h
| September 18 | ||||
| 1am | 65°F19°C | 4 mph6 km/h South | Mostly Clear | |
| 2am | 64°F18°C | 4 mph6 km/h South | Mostly Cloudy | |
| 3am | 64°F18°C | 2 mph4 km/h Southwest | Mostly Cloudy | |
| 4am | 64°F18°C | 4 mph6 km/h West | Partly Cloudy | |
| 5am | 63°F17°C | 4 mph6 km/h Southwest | Mostly Cloudy | |
| 6am | 62°F17°C | 4 mph6 km/h West | Mostly Cloudy | |
| 7am | 61°F16°C | 4 mph7 km/h Southwest | Mostly Cloudy | |
| 8am | 61°F16°C | 5 mph8 km/h Southwest | Mostly Cloudy | |
| 9am | 61°F16°C | 5 mph8 km/h Southwest | Mostly Cloudy | |
| 10am | 61°F16°C | 5 mph8 km/h Southwest | Cloudy | |
| 11am | 62°F17°C | 5 mph9 km/h Southwest | Cloudy | |
| 12pm | 63°F17°C | 6 mph9 km/h Southwest | Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 17 | 57°F14°C | 77°F25°C | 4 mph7 km/h from Northwest | Mostly Clear | Mostly Cloudy |
| September 18 | 61°F16°C | 70°F21°C | 7 mph11 km/h from Southwest | Mostly Cloudy | Cloudy |
| September 19 | 61°F16°C | 70°F21°C | 5 mph8 km/h from Southwest | Partly Cloudy | Partly Cloudy |
| September 20 | 60°F15°C | 72°F22°C | 5 mph9 km/h from West | Mostly Clear | Partly Cloudy |
| September 21 | 59°F15°C | 71°F22°C | 6 mph9 km/h from West | Mostly Clear | Mostly Clear |
| September 22 | 58°F15°C | 78°F26°C | 4 mph7 km/h from West | Clear | Mostly Clear |
| September 23 | 62°F16°C | 73°F23°C | 6 mph9 km/h from West | Drizzle | Partly Cloudy |
No
Low of 61°F16°C, High of 70°F21°CWind: 7 mph11 km/h
Precipitation: 34% rain