Yes
you do need a jacket based on the weather in Hemel Hempstead, UK 1 second ago
Why? Because it's cold enough that makes you wish you had a hat, but you're still too proud to admit it!
44°F7°C & Clear
Wind is 3 mph5 km/h from the North, gusting to 6 mph10 km/h
| September 22 | ||||
| 7pm | 44°F6°C | 3 mph6 km/h North | Clear | |
| 8pm | 42°F6°C | 4 mph6 km/h North | Clear | |
| 9pm | 42°F5°C | 4 mph6 km/h North | Clear | |
| 10pm | 41°F5°C | 4 mph6 km/h Northwest | Clear | |
| 11pm | 41°F5°C | 4 mph7 km/h Northwest | Mostly Clear | |
| September 23 | ||||
| 12am | 41°F5°C | 5 mph9 km/h North | Clear | |
| 1am | 41°F5°C | 6 mph9 km/h North | Clear | |
| 2am | 42°F6°C | 6 mph10 km/h North | Clear | |
| 3am | 44°F7°C | 7 mph12 km/h North | Clear | |
| 4am | 49°F9°C | 9 mph14 km/h North | Clear | |
| 5am | 53°F11°C | 9 mph15 km/h North | Clear | |
| 6am | 56°F13°C | 10 mph17 km/h North | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 21 | 42°F6°C | 61°F16°C | 7 mph12 km/h from North | Mostly Clear | Clear |
| September 22 | 41°F5°C | 62°F17°C | 10 mph16 km/h from Northeast | Partly Cloudy | Mostly Clear |
| September 23 | 46°F8°C | 63°F17°C | 10 mph16 km/h from Northeast | Mostly Cloudy | Mostly Cloudy |
| September 24 | 45°F7°C | 64°F18°C | 11 mph18 km/h from Northeast | Partly Cloudy | Mostly Clear |
| September 25 | 46°F8°C | 62°F16°C | 7 mph11 km/h from East | Partly Cloudy | Mostly Cloudy |
| September 26 | 48°F9°C | 62°F17°C | 7 mph12 km/h from South | Drizzle | Drizzle |
| September 27 | 49°F9°C | 62°F17°C | 6 mph10 km/h from Southwest | Drizzle | Mostly Clear |
Yes
Low of 41°F5°C, High of 62°F17°CWind: 10 mph16 km/h
Precipitation: 20% rain