Yes
you do need a jacket based on the weather in Welwyn Garden City, UK 1 second ago
Why? Because it's cool. Pleasantly cool, but cool!
54°F12°C & Mostly Clear
Wind is 6 mph10 km/h from the North, gusting to 14 mph23 km/h
| September 22 | ||||
| 2pm | 54°F12°C | 7 mph11 km/h North | Mostly Clear | |
| 3pm | 51°F11°C | 5 mph8 km/h North | Mostly Clear | |
| 4pm | 49°F9°C | 4 mph7 km/h North | Mostly Clear | |
| 5pm | 47°F8°C | 4 mph6 km/h North | Clear | |
| 6pm | 45°F7°C | 3 mph5 km/h North | Clear | |
| 7pm | 43°F6°C | 3 mph4 km/h North | Clear | |
| 8pm | 42°F6°C | 3 mph5 km/h North | Clear | |
| 9pm | 42°F5°C | 3 mph5 km/h Northwest | Clear | |
| 10pm | 41°F5°C | 4 mph6 km/h Northwest | Clear | |
| 11pm | 41°F5°C | 5 mph8 km/h North | Clear | |
| September 23 | ||||
| 12am | 41°F5°C | 5 mph9 km/h North | Clear | |
| 1am | 41°F5°C | 6 mph9 km/h North | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 21 | 42°F5°C | 61°F16°C | 7 mph11 km/h from North | Mostly Clear | Clear |
| September 22 | 41°F5°C | 61°F16°C | 10 mph16 km/h from North | Partly Cloudy | Mostly Clear |
| September 23 | 45°F7°C | 63°F17°C | 10 mph16 km/h from Northeast | Mostly Cloudy | Mostly Cloudy |
| September 24 | 47°F8°C | 64°F18°C | 11 mph18 km/h from Northeast | Partly Cloudy | Partly Cloudy |
| September 25 | 47°F8°C | 62°F16°C | 6 mph10 km/h from East | Mostly Cloudy | Mostly Cloudy |
| September 26 | 48°F9°C | 62°F17°C | 7 mph11 km/h from South | Rain | Rain |
| September 27 | 52°F11°C | 62°F17°C | 7 mph11 km/h from North | Drizzle | Partly Cloudy |
Yes
Low of 41°F5°C, High of 62°F17°CWind: 10 mph16 km/h
Precipitation: None