Yes
you do need a jacket based on the weather in Harpenden AL5, UK 1 second ago
Why? Because there's a refreshing nip in the air!
41°F5°C & Cloudy
Wind is 6 mph10 km/h from the Southwest, gusting to 15 mph24 km/h
| December 23 | ||||
| 3pm | 41°F5°C | 7 mph11 km/h Southwest | Cloudy | |
| 4pm | 42°F5°C | 7 mph11 km/h Southwest | Cloudy | |
| 5pm | 42°F6°C | 7 mph11 km/h Southwest | Cloudy | |
| 6pm | 43°F6°C | 6 mph10 km/h Southwest | Cloudy | |
| 7pm | 43°F6°C | 6 mph9 km/h Southwest | Cloudy | |
| 8pm | 44°F7°C | 5 mph9 km/h West | Cloudy | |
| 9pm | 45°F7°C | 5 mph9 km/h West | Cloudy | |
| 10pm | 46°F8°C | 6 mph10 km/h West | Cloudy | |
| 11pm | 47°F8°C | 7 mph11 km/h West | Cloudy | |
| December 24 | ||||
| 12am | 48°F9°C | 7 mph11 km/h West | Mostly Cloudy | |
| 1am | 48°F9°C | 7 mph11 km/h West | Cloudy | |
| 2am | 48°F9°C | 6 mph10 km/h West | Mostly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| December 22 | 37°F3°C | 43°F6°C | 6 mph10 km/h from West | Mostly Cloudy | Drizzle |
| December 23 | 43°F6°C | 54°F12°C | 7 mph11 km/h from West | Mostly Cloudy | Mostly Cloudy |
| December 24 | 44°F6°C | 50°F10°C | 5 mph8 km/h from Southwest | Mostly Cloudy | Mostly Cloudy |
| December 25 | 42°F5°C | 48°F9°C | 2 mph4 km/h from Southwest | Mostly Cloudy | Mostly Cloudy |
| December 26 | 41°F5°C | 47°F8°C | 2 mph4 km/h from Southwest | Mostly Cloudy | Cloudy |
| December 27 | 41°F5°C | 46°F8°C | 5 mph8 km/h from Southwest | Cloudy | Mostly Cloudy |
| December 28 | 37°F3°C | 45°F7°C | 5 mph8 km/h from Southwest | Mostly Cloudy | Mostly Cloudy |
Yes
Low of 44°F7°C, High of 54°F12°CWind: 7 mph11 km/h
Precipitation: None