Yes
you do need a jacket based on the weather in Fontana, CA 92336, USA 1 second ago
Why? Because it's not very warm out.
57°F14°C & Cloudy
Wind is 10 mph16 km/h from the SW, gusting to 19 mph30 km/h
| April 25 | ||||
| 10pm | 56°F13°C | 9 mph14 km/h SW | Mostly Cloudy | |
| 11pm | 54°F12°C | 8 mph12 km/h SW | Mostly Cloudy | |
| April 26 | ||||
| 12am | 53°F12°C | 7 mph11 km/h SW | Mostly Cloudy | |
| 1am | 52°F11°C | 6 mph10 km/h SW | Cloudy | |
| 2am | 52°F11°C | 6 mph9 km/h SW | Cloudy | |
| 3am | 51°F11°C | 5 mph8 km/h SW | Cloudy | |
| 4am | 51°F10°C | 4 mph6 km/h S | Cloudy | |
| 5am | 50°F10°C | 4 mph6 km/h S | Cloudy | |
| 6am | 50°F10°C | 3 mph6 km/h S | Cloudy | |
| 7am | 49°F10°C | 3 mph5 km/h S | Cloudy | |
| 8am | 49°F9°C | 3 mph6 km/h S | Cloudy | |
| 9am | 48°F9°C | 3 mph5 km/h S | Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| April 25 | 49°F10°C | 62°F16°C | 8 mph12 km/h from SW | Mostly Cloudy | Cloudy |
| April 26 | 48°F9°C | 62°F17°C | 7 mph11 km/h from SW | Mostly Cloudy | Partly Cloudy |
| April 27 | 48°F9°C | 68°F20°C | 5 mph9 km/h from SW | Mostly Clear | Clear |
| April 28 | 49°F10°C | 74°F23°C | 5 mph7 km/h from SW | Clear | Clear |
| April 29 | 55°F13°C | 78°F26°C | 5 mph7 km/h from SW | Clear | Clear |
| April 30 | 57°F14°C | 78°F25°C | 5 mph8 km/h from SW | Clear | Partly Cloudy |
| May 1 | 54°F12°C | 80°F27°C | 7 mph12 km/h from N | Clear | Clear |
Yes
Low of 48°F9°C, High of 63°F17°CWind: 7 mph11 km/h
Precipitation: 17% rain