No
you don't need a jacket based on the weather in Hemel Hempstead, UK 1 second ago
81°F27°C & Clear
Wind is 8 mph13 km/h from the Northeast, gusting to 17 mph28 km/h
| July 12 | ||||
| 8am | 81°F27°C | 9 mph14 km/h Northeast | Clear | |
| 9am | 82°F28°C | 10 mph16 km/h Northeast | Clear | |
| 10am | 83°F28°C | 10 mph16 km/h Northeast | Clear | |
| 11am | 84°F29°C | 10 mph16 km/h Northeast | Clear | |
| 12pm | 83°F28°C | 9 mph15 km/h Northeast | Partly Cloudy | |
| 1pm | 81°F27°C | 11 mph17 km/h East | Mostly Clear | |
| 2pm | 80°F26°C | 9 mph15 km/h East | Mostly Clear | |
| 3pm | 77°F25°C | 9 mph14 km/h East | Mostly Clear | |
| 4pm | 74°F23°C | 7 mph12 km/h East | Mostly Clear | |
| 5pm | 70°F21°C | 5 mph9 km/h East | Mostly Clear | |
| 6pm | 67°F20°C | 4 mph7 km/h East | Mostly Clear | |
| 7pm | 64°F18°C | 3 mph6 km/h Northeast | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| July 11 | 60°F16°C | 84°F29°C | 7 mph11 km/h from Northeast | Clear | Mostly Clear |
| July 12 | 57°F14°C | 81°F27°C | 6 mph9 km/h from Northeast | Mostly Clear | Mostly Cloudy |
| July 13 | 58°F15°C | 76°F24°C | 14 mph23 km/h from Southwest | Partly Cloudy | Mostly Clear |
| July 14 | 55°F13°C | 69°F21°C | 14 mph23 km/h from Southwest | Mostly Cloudy | Drizzle |
| July 15 | 55°F13°C | 73°F23°C | 9 mph14 km/h from Northwest | Drizzle | Mostly Cloudy |
| July 16 | 58°F15°C | 78°F25°C | 5 mph8 km/h from West | Mostly Cloudy | Mostly Cloudy |
| July 17 | 60°F16°C | 78°F26°C | 6 mph9 km/h from Southeast | Mostly Cloudy | Mostly Cloudy |
Yes
Low of 57°F14°C, High of 81°F27°CWind: 6 mph9 km/h
Precipitation: None