Yes
you do need a jacket based on the weather in Pleasant Hill, CA, USA 1 second ago
Why? Because it's not very warm out.
57°F14°C & Mostly Clear
Wind is 7 mph11 km/h from the SW, gusting to 15 mph24 km/h
| September 20 | ||||
| 5am | 57°F14°C | 7 mph11 km/h SW | Partly Cloudy | |
| 6am | 56°F13°C | 7 mph11 km/h SW | Partly Cloudy | |
| 7am | 55°F13°C | 7 mph11 km/h SW | Partly Cloudy | |
| 8am | 55°F13°C | 7 mph11 km/h SW | Partly Cloudy | |
| 9am | 54°F12°C | 6 mph10 km/h SW | Partly Cloudy | |
| 10am | 55°F13°C | 6 mph10 km/h SW | Partly Cloudy | |
| 11am | 57°F14°C | 6 mph10 km/h SW | Mostly Cloudy | |
| 12pm | 60°F16°C | 6 mph10 km/h SW | Mostly Clear | |
| 1pm | 65°F18°C | 5 mph8 km/h SW | Mostly Clear | |
| 2pm | 70°F21°C | 5 mph7 km/h SW | Clear | |
| 3pm | 74°F23°C | 5 mph8 km/h SW | Clear | |
| 4pm | 78°F25°C | 6 mph10 km/h W | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 20 | 54°F12°C | 80°F27°C | 7 mph12 km/h from SW | Mostly Clear | Clear |
| September 21 | 53°F12°C | 83°F28°C | 5 mph8 km/h from W | Clear | Mostly Clear |
| September 22 | 54°F12°C | 85°F29°C | 5 mph8 km/h from W | Clear | Clear |
| September 23 | 55°F13°C | 92°F33°C | 3 mph5 km/h from NW | Mostly Clear | Mostly Clear |
| September 24 | 59°F15°C | 92°F33°C | 4 mph7 km/h from W | Clear | Mostly Clear |
| September 25 | 56°F13°C | 80°F26°C | 8 mph13 km/h from SW | Clear | Partly Cloudy |
| September 26 | 55°F13°C | 76°F25°C | 7 mph12 km/h from SW | Partly Cloudy | Mostly Clear |
Yes
Low of 53°F12°C, High of 83°F29°CWind: 5 mph8 km/h
Precipitation: None