Weather on August 21 in London
Historical weather data for August 21 in London, United Kingdom
Avg High22°C (71°F)
Avg Low13°C (55°F)
Warmest201523°C
Coldest199913°C
Based on 55 years of data from HAMPSTEAD
About This Date
August 21st in London, United Kingdom typically brings pleasant summer weather, with average highs around 22°C and lows near 13°C. Over 55 years of records, the warmest August 21st was in 2015 (23°C average), while the coldest was 1999 (13°C) — a 17°F range across recorded history. Rain or other precipitation has occurred on about 29% of August 21st dates historically.
Planning for August 21st in London? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2025 | 21°C (70°F) | -- | 0 mm |
| 2024 | 22°C (71°F) | 12°C (53°F) | 0 mm |
| 2023 | 25°C (77°F) | 14°C (58°F) | 0 mm |
| 2022 | 26°C (78°F) | -- | 0 mm |
| 2021 | -- | 16°C (60°F) | 0 mm |
| 2020 | 24°C (75°F) | -- | 0 mm |
| 2019 | -- | 11°C (51°F) | 0 mm |
| 2018 | 22°C (72°F) | 15°C (59°F) | 0 mm |
| 2017 | -- | 13°C (56°F) | 7 mm |
| 2016 | -- | 14°C (58°F) | 1 mm |
| 2015 | 29°C (85°F) | 17°C (62°F) | 0 mm |
| 2014 | 20°C (68°F) | 7°C (45°F) | 0 mm |
| 2013 | 22°C (71°F) | 12°C (54°F) | 4 mm |
| 2012 | 22°C (71°F) | 15°C (59°F) | 0 mm |
| 2011 | 22°C (71°F) | 14°C (58°F) | 0 mm |
| 2010 | 22°C (71°F) | 18°C (64°F) | 1 mm |
| 2009 | 21°C (70°F) | 12°C (54°F) | 1 mm |
| 2008 | 21°C (70°F) | 13°C (56°F) | 1 mm |
| 2007 | 16°C (60°F) | 12°C (53°F) | 3 mm |
| 2006 | 22°C (71°F) | 13°C (55°F) | 0 mm |
| 2005 | 24°C (75°F) | 13°C (56°F) | 2 mm |
| 2004 | 21°C (70°F) | 9°C (49°F) | 0 mm |
| 2003 | 24°C (76°F) | 13°C (55°F) | 0 mm |
| 2002 | 23°C (73°F) | 13°C (55°F) | 0 mm |
| 2001 | 25°C (77°F) | 11°C (52°F) | 0 mm |
| 2000 | 22°C (71°F) | 10°C (50°F) | 0 mm |
| 1999 | 18°C (64°F) | 9°C (48°F) | 0 mm |
| 1998 | 19°C (67°F) | 16°C (60°F) | 0 mm |
| 1997 | 26°C (79°F) | 17°C (63°F) | -- |
| 1996 | 22°C (71°F) | 14°C (58°F) | -- |
| 1995 | 29°C (85°F) | 15°C (59°F) | 0 mm |
| 1994 | 24°C (75°F) | 12°C (53°F) | 0 mm |
| 1993 | 16°C (60°F) | 13°C (56°F) | 10 mm |
| 1992 | 19°C (67°F) | 12°C (53°F) | 1 mm |
| 1991 | 23°C (73°F) | 15°C (59°F) | 0 mm |
| 1990 | 25°C (77°F) | 13°C (55°F) | 0 mm |
| 1989 | 23°C (74°F) | 16°C (61°F) | 0 mm |
| 1988 | 17°C (63°F) | 12°C (53°F) | 0 mm |
| 1987 | 24°C (76°F) | 17°C (63°F) | 12 mm |
| 1986 | 19°C (67°F) | 11°C (52°F) | 2 mm |
| 1985 | 19°C (67°F) | 12°C (53°F) | 9 mm |
| 1984 | 24°C (76°F) | 17°C (62°F) | 0 mm |
| 1983 | 24°C (76°F) | 16°C (60°F) | 9 mm |
| 1982 | 19°C (67°F) | 9°C (49°F) | 0 mm |
| 1981 | 21°C (69°F) | 9°C (48°F) | 0 mm |
| 1980 | 17°C (62°F) | 13°C (56°F) | 0 mm |
| 1979 | 18°C (65°F) | 13°C (55°F) | 0 mm |
| 1978 | 22°C (71°F) | 14°C (57°F) | 0 mm |
| 1977 | 16°C (61°F) | 12°C (53°F) | 0 mm |
| 1976 | 23°C (74°F) | 13°C (55°F) | 0 mm |
| 1975 | 21°C (69°F) | 13°C (56°F) | 0 mm |
| 1974 | 23°C (74°F) | 9°C (48°F) | 0 mm |
| 1973 | 21°C (69°F) | 14°C (58°F) | 0 mm |
| 1972 | 21°C (70°F) | 9°C (49°F) | 0 mm |
| 1971 | 20°C (68°F) | 14°C (58°F) | 0 mm |