No
you don't need a jacket based on the weather in Fontana, CA, USA 1 second ago
61°F16°C & Clear
Wind is 4 mph7 km/h from the W, gusting to 9 mph15 km/h
| May 18 | ||||
| 2am | 60°F16°C | 4 mph6 km/h SW | Mostly Clear | |
| 3am | 59°F15°C | 2 mph4 km/h SW | Partly Cloudy | |
| 4am | 57°F14°C | 2 mph3 km/h SW | Mostly Cloudy | |
| 5am | 56°F13°C | 2 mph4 km/h SW | Mostly Cloudy | |
| 6am | 55°F13°C | 2 mph3 km/h W | Cloudy | |
| 7am | 55°F13°C | 2 mph3 km/h SW | Mostly Cloudy | |
| 8am | 54°F12°C | 3 mph4 km/h SW | Cloudy | |
| 9am | 55°F13°C | 2 mph4 km/h SW | Cloudy | |
| 10am | 56°F13°C | 2 mph4 km/h SW | Mostly Cloudy | |
| 11am | 57°F14°C | 2 mph4 km/h SW | Mostly Cloudy | |
| 12pm | 60°F15°C | 3 mph4 km/h SW | Partly Cloudy | |
| 1pm | 63°F17°C | 3 mph5 km/h SW | Partly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| May 17 | 56°F14°C | 72°F22°C | 4 mph6 km/h from SW | Partly Cloudy | Partly Cloudy |
| May 18 | 54°F12°C | 77°F25°C | 6 mph9 km/h from SW | Mostly Clear | Mostly Clear |
| May 19 | 52°F11°C | 74°F23°C | 5 mph9 km/h from SW | Mostly Clear | Partly Cloudy |
| May 20 | 52°F11°C | 70°F21°C | 6 mph10 km/h from SW | Mostly Clear | Mostly Clear |
| May 21 | 51°F11°C | 78°F26°C | 5 mph9 km/h from SW | Clear | Clear |
| May 22 | 56°F13°C | 79°F26°C | 7 mph11 km/h from SW | Clear | Mostly Clear |
| May 23 | 53°F12°C | 75°F24°C | 5 mph9 km/h from SW | Mostly Clear | Partly Cloudy |
Yes
Low of 55°F13°C, High of 77°F25°CWind: 6 mph9 km/h
Precipitation: None