Weather on September 17 in London
Historical weather data for September 17 in London, United Kingdom
Based on 55 years of data from HAMPSTEAD
About This Date
September 17th 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 17th was in 1982 (20°C average), while the coldest was 1972 (9°C) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 36% of September 17th dates historically, with the wettest September 17th recording 0.89" of rain. The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
Planning for September 17th in London? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip |
|---|---|---|---|
| 2025 | 21°C (70°F) | 11°C (51°F) | 0" |
| 2024 | 22°C (71°F) | 10°C (50°F) | 0" |
| 2023 | 23°C (74°F) | -- | 0" |
| 2022 | 18°C (64°F) | 6°C (43°F) | 0" |
| 2021 | 22°C (72°F) | -- | 0" |
| 2020 | -- | 13°C (55°F) | 0" |
| 2019 | -- | 9°C (49°F) | 0.08" |
| 2018 | 22°C (72°F) | 16°C (60°F) | 0" |
| 2017 | 16°C (60°F) | 7°C (45°F) | 0.16" |
| 2016 | -- | 13°C (55°F) | 0.89" |
| 2015 | 18°C (64°F) | 8°C (47°F) | 0" |
| 2014 | 25°C (77°F) | 15°C (59°F) | 0" |
| 2013 | 16°C (60°F) | 7°C (44°F) | 0.64" |
| 2012 | 17°C (63°F) | 13°C (55°F) | 0" |
| 2011 | 16°C (60°F) | 13°C (55°F) | 0.12" |
| 2010 | 17°C (62°F) | 7°C (44°F) | 0" |
| 2009 | 19°C (66°F) | 11°C (51°F) | 0" |
| 2008 | 18°C (65°F) | 11°C (51°F) | 0" |
| 2007 | 17°C (62°F) | 12°C (53°F) | 0" |
| 2006 | 23°C (74°F) | 16°C (61°F) | 0" |
| 2005 | 17°C (62°F) | 5°C (41°F) | 0" |
| 2004 | 21°C (69°F) | 13°C (55°F) | 0.15" |
| 2003 | 21°C (70°F) | 12°C (54°F) | 0" |
| 2002 | 17°C (62°F) | 11°C (51°F) | 0" |
| 2001 | 14°C (57°F) | 7°C (44°F) | 0.16" |
| 2000 | 16°C (60°F) | 11°C (51°F) | 0" |
| 1999 | 18°C (64°F) | 11°C (51°F) | 0.03" |
| 1998 | 19°C (67°F) | 7°C (45°F) | 0.05" |
| 1997 | 24°C (75°F) | 13°C (56°F) | 0.04" |
| 1996 | 14°C (58°F) | 11°C (51°F) | -- |
| 1995 | 19°C (66°F) | 12°C (54°F) | 0.15" |
| 1994 | 13°C (56°F) | 6°C (42°F) | 0" |
| 1993 | 17°C (62°F) | 10°C (50°F) | 0" |
| 1992 | 18°C (65°F) | 9°C (48°F) | 0.17" |
| 1991 | 18°C (65°F) | 11°C (51°F) | 0" |
| 1990 | 21°C (69°F) | 11°C (51°F) | 0.22" |
| 1989 | 22°C (72°F) | 17°C (62°F) | 0" |
| 1988 | 18°C (64°F) | 13°C (55°F) | 0" |
| 1987 | 21°C (70°F) | 14°C (58°F) | 0.25" |
| 1986 | 15°C (59°F) | 7°C (44°F) | 0" |
| 1985 | 19°C (67°F) | 12°C (53°F) | 0" |
| 1984 | 16°C (61°F) | 13°C (55°F) | 0.81" |
| 1983 | 16°C (61°F) | 11°C (51°F) | 0.52" |
| 1982 | 27°C (80°F) | 13°C (56°F) | 0" |
| 1981 | 18°C (65°F) | 13°C (55°F) | 0.31" |
| 1980 | 17°C (63°F) | 11°C (51°F) | 0" |
| 1979 | 18°C (64°F) | 9°C (49°F) | 0" |
| 1978 | 18°C (64°F) | 12°C (53°F) | 0" |
| 1977 | 13°C (56°F) | 7°C (44°F) | 0" |
| 1976 | 19°C (66°F) | 8°C (47°F) | 0" |
| 1975 | 19°C (67°F) | 8°C (46°F) | 0.12" |
| 1974 | 16°C (61°F) | 11°C (51°F) | 0" |
| 1973 | 18°C (65°F) | 16°C (60°F) | 0.37" |
| 1972 | 12°C (54°F) | 7°C (45°F) | 0.01" |
| 1971 | 21°C (69°F) | 8°C (47°F) | 0" |