Weather on December 21 in London
Historical weather data for December 21 in London, United Kingdom
Avg High8°C (46°F)
Avg Low3°C (37°F)
Warmest197110°C
Coldest2010-2°C
Based on 55 years of data from HAMPSTEAD
About This Date
December 21st in London, United Kingdom typically brings chilly winter weather, with average highs around 8°C and lows near 3°C. Over 55 years of records, the warmest December 21st was in 1971 (10°C average), while the coldest was 2010 (-2°C) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 62% of December 21st dates historically, with the wettest December 21st recording 2.42" of rain.
Planning for December 21st in London? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip |
|---|---|---|---|
| 2025 | 9°C (49°F) | 1°C (34°F) | 0.46" |
| 2024 | -- | 4°C (40°F) | 0.08" |
| 2023 | -- | 10°C (50°F) | 0" |
| 2022 | 12°C (54°F) | 4°C (40°F) | 0.03" |
| 2021 | 6°C (43°F) | -- | 0" |
| 2020 | -- | 5°C (41°F) | 0.05" |
| 2019 | -- | 4°C (40°F) | 0.84" |
| 2018 | -- | 8°C (47°F) | 0" |
| 2017 | 11°C (51°F) | 7°C (45°F) | 0.02" |
| 2016 | -- | 4°C (39°F) | 0" |
| 2015 | 14°C (58°F) | 6°C (43°F) | 0.24" |
| 2014 | 12°C (54°F) | 3°C (38°F) | 0" |
| 2013 | 9°C (49°F) | 2°C (36°F) | 0.72" |
| 2012 | 12°C (54°F) | 6°C (43°F) | 0.9" |
| 2011 | 13°C (55°F) | 5°C (41°F) | 0.04" |
| 2010 | 1°C (33°F) | -5°C (23°F) | 0.12" |
| 2009 | 2°C (35°F) | -4°C (25°F) | 1.25" |
| 2008 | 11°C (51°F) | 8°C (47°F) | 0" |
| 2007 | 4°C (39°F) | -1°C (31°F) | 0" |
| 2006 | 1°C (33°F) | -2°C (29°F) | 0.02" |
| 2005 | 9°C (49°F) | 2°C (35°F) | 0" |
| 2004 | 11°C (51°F) | 1°C (33°F) | 0.94" |
| 2003 | 4°C (39°F) | 3°C (37°F) | 0" |
| 2002 | 12°C (53°F) | 2°C (36°F) | 2.42" |
| 2001 | 2°C (36°F) | -2°C (29°F) | 0.07" |
| 2000 | 4°C (40°F) | 5°C (41°F) | 0" |
| 1999 | 11°C (51°F) | -3°C (27°F) | 0.08" |
| 1998 | 8°C (47°F) | -3°C (26°F) | 0.21" |
| 1997 | 8°C (46°F) | 4°C (40°F) | -- |
| 1996 | 4°C (40°F) | 1°C (34°F) | -- |
| 1995 | 12°C (54°F) | -1°C (30°F) | 1.75" |
| 1994 | 6°C (42°F) | 1°C (33°F) | 0" |
| 1993 | 8°C (47°F) | 2°C (35°F) | 0.21" |
| 1992 | 4°C (39°F) | 0°C (32°F) | 0" |
| 1991 | 12°C (54°F) | 3°C (38°F) | 0.09" |
| 1990 | 10°C (50°F) | 4°C (39°F) | 0.1" |
| 1989 | 8°C (47°F) | 9°C (49°F) | 0.23" |
| 1988 | 11°C (51°F) | 3°C (38°F) | 0" |
| 1987 | 8°C (47°F) | 8°C (46°F) | 0" |
| 1986 | 3°C (37°F) | -1°C (31°F) | 0.13" |
| 1985 | 9°C (48°F) | 8°C (47°F) | 0.17" |
| 1984 | 9°C (49°F) | 2°C (35°F) | 0" |
| 1983 | 11°C (51°F) | 6°C (43°F) | 0.32" |
| 1982 | 4°C (39°F) | 3°C (38°F) | 0.03" |
| 1981 | 1°C (33°F) | -1°C (31°F) | 0.35" |
| 1980 | 11°C (52°F) | 2°C (36°F) | 0.04" |
| 1979 | 3°C (37°F) | 1°C (33°F) | -- |
| 1978 | 3°C (38°F) | -1°C (30°F) | 0.35" |
| 1977 | 11°C (52°F) | 0°C (32°F) | 0.14" |
| 1976 | 8°C (47°F) | 3°C (37°F) | 0" |
| 1975 | 7°C (45°F) | 1°C (34°F) | 0" |
| 1974 | 11°C (51°F) | 9°C (48°F) | 0.13" |
| 1973 | 7°C (45°F) | 8°C (46°F) | 0.68" |
| 1972 | 3°C (37°F) | 1°C (34°F) | 0" |
| 1971 | 11°C (52°F) | 8°C (47°F) | 0.2" |