Weather on May 21 in London
Historical weather data for May 21 in London, United Kingdom
Based on 56 years of data from HAMPSTEAD
About This Date
May 21st in London, United Kingdom typically brings mild spring weather, with average highs around 17°C and lows near 9°C. Over 56 years of records, the warmest May 21st was in 1992 (18°C average), while the coldest was 1987 (8°C) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 43% of May 21st dates historically, with the wettest May 21st recording 2.03" of rain. The last decade has been 3.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.4°F warmer on this date compared to 20-30 years ago.
Planning for May 21st in London? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2026 | 27°C (80°F) | 8°C (47°F) | 0 mm |
| 2025 | 14°C (57°F) | 10°C (50°F) | 0 mm |
| 2024 | 21°C (69°F) | -- | 0 mm |
| 2023 | 19°C (67°F) | 8°C (47°F) | 0 mm |
| 2022 | 22°C (72°F) | 9°C (49°F) | 7 mm |
| 2021 | 13°C (56°F) | -- | 2 mm |
| 2020 | 21°C (69°F) | 10°C (50°F) | 0 mm |
| 2019 | -- | 9°C (49°F) | 0 mm |
| 2018 | 20°C (68°F) | 6°C (43°F) | 0 mm |
| 2017 | -- | 8°C (47°F) | 1 mm |
| 2016 | 19°C (66°F) | 12°C (54°F) | 1 mm |
| 2015 | 19°C (66°F) | 4°C (40°F) | 0 mm |
| 2014 | 18°C (64°F) | 9°C (49°F) | 14 mm |
| 2013 | 13°C (56°F) | 11°C (52°F) | 0 mm |
| 2012 | 24°C (76°F) | 8°C (47°F) | 0 mm |
| 2011 | 18°C (64°F) | 8°C (47°F) | 3 mm |
| 2010 | 23°C (73°F) | 13°C (56°F) | 0 mm |
| 2009 | 18°C (65°F) | 8°C (46°F) | 0 mm |
| 2008 | 18°C (65°F) | 6°C (42°F) | 0 mm |
| 2007 | 17°C (63°F) | 9°C (49°F) | 5 mm |
| 2006 | 13°C (56°F) | 9°C (49°F) | 22 mm |
| 2005 | 14°C (58°F) | 9°C (48°F) | 16 mm |
| 2004 | 15°C (59°F) | 8°C (47°F) | 0 mm |
| 2003 | 18°C (64°F) | 8°C (47°F) | 11 mm |
| 2002 | 17°C (63°F) | 12°C (54°F) | 25 mm |
| 2001 | 18°C (64°F) | 8°C (46°F) | 0 mm |
| 2000 | 18°C (65°F) | 7°C (45°F) | 3 mm |
| 1999 | 18°C (64°F) | 11°C (51°F) | 0 mm |
| 1998 | 17°C (62°F) | 13°C (56°F) | 0 mm |
| 1997 | 13°C (56°F) | 10°C (50°F) | -- |
| 1996 | 13°C (56°F) | 7°C (45°F) | -- |
| 1995 | 19°C (66°F) | 4°C (40°F) | 0 mm |
| 1994 | 16°C (60°F) | 9°C (49°F) | 49 mm |
| 1993 | 18°C (64°F) | 8°C (47°F) | 0 mm |
| 1992 | 25°C (77°F) | 12°C (53°F) | 0 mm |
| 1991 | 21°C (70°F) | 11°C (52°F) | 0 mm |
| 1990 | 17°C (62°F) | 8°C (46°F) | 0 mm |
| 1989 | 23°C (73°F) | 13°C (55°F) | 0 mm |
| 1988 | 17°C (62°F) | 7°C (44°F) | 0 mm |
| 1987 | 12°C (54°F) | 4°C (39°F) | 4 mm |
| 1986 | 15°C (59°F) | 9°C (48°F) | 8 mm |
| 1985 | 14°C (57°F) | 11°C (52°F) | 7 mm |
| 1984 | 13°C (56°F) | 5°C (41°F) | 52 mm |
| 1983 | 14°C (58°F) | 5°C (41°F) | 2 mm |
| 1982 | 16°C (61°F) | 13°C (55°F) | 11 mm |
| 1981 | 16°C (60°F) | 9°C (49°F) | 13 mm |
| 1980 | 14°C (57°F) | 8°C (46°F) | 0 mm |
| 1979 | 14°C (57°F) | 7°C (45°F) | 16 mm |
| 1978 | 16°C (60°F) | 7°C (45°F) | 1 mm |
| 1977 | 19°C (67°F) | 8°C (47°F) | 0 mm |
| 1976 | 19°C (66°F) | 6°C (43°F) | 0 mm |
| 1975 | 14°C (58°F) | 8°C (46°F) | 0 mm |
| 1974 | 21°C (69°F) | 5°C (41°F) | 1 mm |
| 1973 | 19°C (67°F) | 11°C (51°F) | 7 mm |
| 1972 | 17°C (63°F) | 8°C (46°F) | 0 mm |
| 1971 | 16°C (60°F) | 7°C (44°F) | 0 mm |