Yes
you do need a jacket based on the weather in San Francisco, CA 94117, USA 1 second ago
Why? Because just cool enough for a jacket, but not warm enough to ditch it!
57°F14°C & Mostly Clear
Wind is 6 mph10 km/h from the West, gusting to 11 mph17 km/h
| May 10 | ||||
| 12pm | 58°F15°C | 6 mph10 km/h West | Clear | |
| 1pm | 61°F16°C | 7 mph11 km/h West | Clear | |
| 2pm | 64°F18°C | 9 mph14 km/h West | Clear | |
| 3pm | 66°F19°C | 11 mph17 km/h West | Clear | |
| 4pm | 67°F19°C | 12 mph19 km/h West | Clear | |
| 5pm | 68°F20°C | 12 mph20 km/h West | Clear | |
| 6pm | 71°F21°C | 11 mph18 km/h West | Clear | |
| 7pm | 70°F21°C | 11 mph18 km/h West | Clear | |
| 8pm | 68°F20°C | 11 mph18 km/h West | Clear | |
| 9pm | 66°F19°C | 11 mph18 km/h West | Clear | |
| 10pm | 64°F18°C | 11 mph17 km/h West | Clear | |
| 11pm | 61°F16°C | 10 mph16 km/h West | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| May 10 | 51°F11°C | 71°F21°C | 10 mph16 km/h from West | Clear | Mostly Clear |
| May 11 | 52°F11°C | 60°F16°C | 11 mph18 km/h from West | Mostly Clear | Mostly Cloudy |
| May 12 | 52°F11°C | 60°F15°C | 11 mph17 km/h from West | Drizzle | Partly Cloudy |
| May 13 | 50°F10°C | 63°F17°C | 9 mph14 km/h from West | Mostly Clear | Mostly Clear |
| May 14 | 50°F10°C | 64°F18°C | 7 mph12 km/h from West | Mostly Clear | Mostly Clear |
| May 15 | 51°F11°C | 64°F18°C | 7 mph11 km/h from Southwest | Partly Cloudy | Mostly Cloudy |
| May 16 | 51°F11°C | 63°F17°C | 9 mph14 km/h from West | Partly Cloudy | Partly Cloudy |
Yes
Low of 52°F11°C, High of 60°F16°CWind: 11 mph18 km/h
Precipitation: None