On 21 August 2004 in London, England, United Kingdom it was cool with some rain, and the high was 19°C (66°F), the low was 12°C (53°F) and the precipitation was 1.5 mm (0.06 in).
| Time | Temperature | Precipitation |
|---|---|---|
| 00:00 | 13° | 0.4 mm |
| 01:00 | 13° | 0.3 mm |
| 02:00 | 13° | 0.4 mm |
| 03:00 | 12° | 0.3 mm |
| 04:00 | 12° | 0.0 mm |
| 05:00 | 12° | 0.0 mm |
| 06:00 | 12° | 0.0 mm |
| 07:00 | 12° | 0.0 mm |
| 08:00 | 13° | 0.0 mm |
| 09:00 | 14° | 0.0 mm |
| 10:00 | 16° | 0.0 mm |
| 11:00 | 17° | 0.0 mm |
| 12:00 | 18° | 0.0 mm |
| 13:00 | 18° | 0.0 mm |
| 14:00 | 19° | 0.1 mm |
| 15:00 | 19° | 0.0 mm |
| 16:00 | 19° | 0.0 mm |
| 17:00 | 19° | 0.0 mm |
| 18:00 | 19° | 0.0 mm |
| 19:00 | 18° | 0.0 mm |
| 20:00 | 16° | 0.0 mm |
| 21:00 | 15° | 0.0 mm |
| 22:00 | 14° | 0.0 mm |
| 23:00 | 14° | 0.0 mm |