Yes
you do need a jacket based on the weather in San Francisco, CA, USA 28 minutes ago
Why? Because just cool enough for a jacket, but not warm enough to ditch it!
57°F14°C & Cloudy
Wind is 4 mph7 km/h from the Southwest, gusting to 12 mph19 km/h
| July 18 | ||||
| 5am | 57°F14°C | 5 mph8 km/h Southwest | Cloudy | |
| 6am | 57°F14°C | 5 mph8 km/h Southwest | Cloudy | |
| 7am | 56°F13°C | 5 mph9 km/h West | Cloudy | |
| 8am | 56°F13°C | 5 mph8 km/h West | Cloudy | |
| 9am | 56°F13°C | 4 mph7 km/h West | Cloudy | |
| 10am | 56°F13°C | 4 mph7 km/h West | Cloudy | |
| 11am | 57°F14°C | 5 mph8 km/h West | Mostly Cloudy | |
| 12pm | 58°F14°C | 6 mph10 km/h West | Mostly Cloudy | |
| 1pm | 60°F15°C | 6 mph10 km/h West | Mostly Cloudy | |
| 2pm | 61°F16°C | 7 mph12 km/h West | Mostly Cloudy | |
| 3pm | 63°F17°C | 8 mph14 km/h West | Partly Cloudy | |
| 4pm | 64°F18°C | 10 mph16 km/h West | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| July 18 | 56°F13°C | 65°F18°C | 9 mph14 km/h from West | Partly Cloudy | Mostly Cloudy |
| July 19 | 55°F13°C | 64°F18°C | 9 mph15 km/h from West | Partly Cloudy | Mostly Cloudy |
| July 20 | 55°F13°C | 65°F18°C | 10 mph17 km/h from Southwest | Partly Cloudy | Mostly Cloudy |
| July 21 | 56°F13°C | 66°F19°C | 12 mph19 km/h from West | Mostly Cloudy | Cloudy |
| July 22 | 56°F13°C | 66°F19°C | 9 mph15 km/h from West | Mostly Cloudy | Mostly Cloudy |
| July 23 | 56°F14°C | 66°F19°C | 9 mph14 km/h from West | Mostly Cloudy | Mostly Cloudy |
| July 24 | 57°F14°C | 67°F20°C | 9 mph15 km/h from West | Mostly Cloudy | Mostly Cloudy |
Yes
Low of 55°F13°C, High of 64°F18°CWind: 9 mph15 km/h
Precipitation: None