Weather on September 12 in London
Historical weather data for September 12 in London, United Kingdom
Based on 55 years of data from HAMPSTEAD
About This Date
September 12th in London, United Kingdom typically brings mild fall weather, with average highs around 18°C and lows near 11°C. Over 55 years of records, the warmest September 12th was in 2022 (21°C average), while the coldest was 1972 (10°C) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 44% of September 12th dates historically, with the wettest September 12th recording 1.44" of rain. The last decade has been 1.1°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.1°F cooler on this date compared to 20-30 years ago.
Planning for September 12th in London? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2025 | 17°C (62°F) | 9°C (48°F) | 12 mm |
| 2024 | 17°C (62°F) | 6°C (43°F) | 1 mm |
| 2023 | 24°C (76°F) | -- | 0 mm |
| 2022 | 26°C (79°F) | 15°C (59°F) | 0 mm |
| 2021 | -- | 12°C (54°F) | 0 mm |
| 2020 | -- | 12°C (54°F) | 1 mm |
| 2019 | -- | 12°C (54°F) | 0 mm |
| 2018 | 19°C (66°F) | 11°C (51°F) | 1 mm |
| 2017 | 19°C (67°F) | 11°C (51°F) | 2 mm |
| 2016 | -- | 11°C (51°F) | 1 mm |
| 2015 | 18°C (65°F) | 14°C (58°F) | 0 mm |
| 2014 | 21°C (69°F) | 12°C (54°F) | 0 mm |
| 2013 | 17°C (63°F) | 12°C (53°F) | 9 mm |
| 2012 | 18°C (65°F) | 7°C (44°F) | 8 mm |
| 2011 | 18°C (65°F) | 14°C (57°F) | 0 mm |
| 2010 | 18°C (64°F) | 11°C (51°F) | 0 mm |
| 2009 | 16°C (61°F) | 11°C (52°F) | 0 mm |
| 2008 | 18°C (65°F) | 12°C (53°F) | 4 mm |
| 2007 | 21°C (70°F) | 10°C (50°F) | 0 mm |
| 2006 | 22°C (72°F) | 16°C (61°F) | 33 mm |
| 2005 | 21°C (69°F) | 13°C (56°F) | 0 mm |
| 2004 | 18°C (65°F) | 9°C (49°F) | 16 mm |
| 2003 | 23°C (74°F) | 11°C (52°F) | 0 mm |
| 2002 | 23°C (73°F) | 13°C (56°F) | 0 mm |
| 2001 | 15°C (59°F) | 12°C (53°F) | 5 mm |
| 2000 | 19°C (67°F) | 15°C (59°F) | 0 mm |
| 1999 | 21°C (69°F) | 17°C (62°F) | 0 mm |
| 1998 | 15°C (59°F) | 7°C (44°F) | 23 mm |
| 1997 | 17°C (62°F) | 13°C (55°F) | 9 mm |
| 1996 | 17°C (63°F) | 12°C (53°F) | -- |
| 1995 | 19°C (66°F) | 12°C (54°F) | 4 mm |
| 1994 | 18°C (65°F) | 12°C (53°F) | 0 mm |
| 1993 | 16°C (60°F) | 9°C (48°F) | 37 mm |
| 1992 | 14°C (57°F) | 8°C (47°F) | 3 mm |
| 1991 | 23°C (73°F) | 11°C (51°F) | 0 mm |
| 1990 | 21°C (69°F) | 12°C (53°F) | 0 mm |
| 1989 | 18°C (65°F) | 15°C (59°F) | 3 mm |
| 1988 | 13°C (56°F) | 9°C (48°F) | 1 mm |
| 1987 | 17°C (62°F) | 16°C (61°F) | 23 mm |
| 1986 | 14°C (57°F) | 7°C (45°F) | 0 mm |
| 1985 | 18°C (64°F) | 13°C (55°F) | 0 mm |
| 1984 | 20°C (68°F) | 12°C (54°F) | 0 mm |
| 1983 | 14°C (58°F) | 8°C (47°F) | 0 mm |
| 1982 | 21°C (70°F) | 13°C (55°F) | 0 mm |
| 1981 | 18°C (64°F) | 11°C (52°F) | 3 mm |
| 1980 | 17°C (62°F) | 13°C (56°F) | 0 mm |
| 1979 | 18°C (65°F) | 11°C (51°F) | 0 mm |
| 1978 | 21°C (70°F) | 9°C (48°F) | 0 mm |
| 1977 | 18°C (64°F) | 11°C (52°F) | 0 mm |
| 1976 | 13°C (55°F) | 8°C (46°F) | 0 mm |
| 1975 | 17°C (62°F) | 6°C (43°F) | 5 mm |
| 1974 | 19°C (67°F) | 12°C (54°F) | 6 mm |
| 1973 | 18°C (65°F) | 9°C (49°F) | 0 mm |
| 1972 | 12°C (54°F) | 8°C (46°F) | 3 mm |
| 1971 | 17°C (63°F) | 9°C (49°F) | 0 mm |