Yes
you do need a jacket based on the weather in Gillespie Field, 1960 Joe Crosson Dr, El Cajon, CA 92020, USA 1 second ago
Why? Because it's not very warm out.
55°F13°C & Mostly Cloudy
Wind is 1 mph2 km/h from the SE, gusting to 2 mph4 km/h
| April 19 | ||||
| 6am | 55°F13°C | 2 mph3 km/h SE | Mostly Cloudy | |
| 7am | 54°F12°C | 2 mph3 km/h E | Mostly Cloudy | |
| 8am | 54°F12°C | 2 mph3 km/h E | Mostly Cloudy | |
| 9am | 53°F12°C | 2 mph3 km/h E | Mostly Cloudy | |
| 10am | 54°F12°C | 2 mph3 km/h E | Mostly Cloudy | |
| 11am | 55°F13°C | 1 mph2 km/h S | Mostly Cloudy | |
| 12pm | 58°F15°C | 2 mph3 km/h SW | Partly Cloudy | |
| 1pm | 61°F16°C | 3 mph5 km/h W | Partly Cloudy | |
| 2pm | 66°F19°C | 5 mph8 km/h W | Mostly Clear | |
| 3pm | 68°F20°C | 6 mph10 km/h W | Mostly Clear | |
| 4pm | 71°F21°C | 8 mph12 km/h W | Mostly Clear | |
| 5pm | 72°F22°C | 8 mph14 km/h W | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| April 19 | 53°F12°C | 72°F22°C | 6 mph9 km/h from W | Mostly Clear | Partly Cloudy |
| April 20 | 52°F11°C | 74°F23°C | 5 mph9 km/h from W | Mostly Clear | Mostly Clear |
| April 21 | 52°F11°C | 78°F26°C | 5 mph8 km/h from W | Clear | Mostly Clear |
| April 22 | 55°F13°C | 74°F23°C | 6 mph10 km/h from W | Mostly Clear | Mostly Cloudy |
| April 23 | 55°F13°C | 69°F20°C | 6 mph9 km/h from W | Partly Cloudy | Mostly Cloudy |
| April 24 | 53°F12°C | 67°F19°C | 6 mph10 km/h from W | Partly Cloudy | Mostly Cloudy |
| April 25 | 54°F12°C | 66°F19°C | 7 mph11 km/h from W | Mostly Cloudy | Mostly Cloudy |
Yes
Low of 53°F12°C, High of 73°F23°CWind: 5 mph9 km/h
Precipitation: None