Yes
you do need a jacket based on the weather in Grand Terrace, CA 92313, USA 4 seconds ago
Why? Because it's cool. Pleasantly cool, but cool.
57°F14°C & Clear
Wind is 2 mph4 km/h from the SW, gusting to 6 mph9 km/h
| May 18 | ||||
| 5am | 56°F14°C | 2 mph3 km/h SW | Mostly Cloudy | |
| 6am | 56°F13°C | 2 mph3 km/h SW | Cloudy | |
| 7am | 55°F13°C | 2 mph3 km/h S | Cloudy | |
| 8am | 55°F13°C | 2 mph4 km/h SW | Cloudy | |
| 9am | 54°F12°C | 2 mph3 km/h SW | Cloudy | |
| 10am | 55°F13°C | 2 mph3 km/h SW | Mostly Cloudy | |
| 11am | 57°F14°C | 2 mph4 km/h W | Mostly Cloudy | |
| 12pm | 60°F15°C | 3 mph4 km/h W | Partly Cloudy | |
| 1pm | 63°F17°C | 3 mph5 km/h W | Mostly Clear | |
| 2pm | 68°F20°C | 4 mph6 km/h W | Clear | |
| 3pm | 71°F22°C | 5 mph8 km/h W | Clear | |
| 4pm | 75°F24°C | 6 mph9 km/h W | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| May 18 | 54°F12°C | 79°F26°C | 6 mph10 km/h from W | Mostly Clear | Mostly Clear |
| May 19 | 52°F11°C | 76°F24°C | 5 mph9 km/h from W | Mostly Clear | Partly Cloudy |
| May 20 | 51°F11°C | 71°F22°C | 6 mph9 km/h from W | Partly Cloudy | Partly Cloudy |
| May 21 | 51°F11°C | 76°F25°C | 6 mph9 km/h from W | Clear | Clear |
| May 22 | 53°F12°C | 79°F26°C | 6 mph10 km/h from W | Clear | Mostly Clear |
| May 23 | 53°F12°C | 75°F24°C | 6 mph10 km/h from W | Mostly Clear | Partly Cloudy |
| May 24 | 53°F12°C | 75°F24°C | 6 mph10 km/h from W | Mostly Clear | Partly Cloudy |
Yes
Low of 52°F11°C, High of 75°F24°CWind: 5 mph9 km/h
Precipitation: None