Weather on September 11 in Colombo
Historical weather data for September 11 in Colombo, Sri Lanka
Based on 52 years of data from COLOMBO
About This Date
September 11th in Colombo, Sri Lanka typically brings pleasant fall weather, with average highs around 23°C and lows near 18°C. Over 52 years of records, the warmest September 11th was in 2025 (29°C average), while the coldest was 1974 (14°C) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 31% of September 11th dates historically, with the wettest September 11th recording 5.79" of rain. The last decade has been 22.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 22.2°F warmer on this date compared to 20-30 years ago.
Planning for September 11th in Colombo? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2025 | 32°C (89°F) | 27°C (81°F) | -- |
| 2024 | 31°C (87°F) | 25°C (77°F) | -- |
| 2023 | 31°C (87°F) | 25°C (77°F) | 52 mm |
| 2022 | 30°C (86°F) | 27°C (80°F) | 0 mm |
| 2021 | 31°C (88°F) | 27°C (81°F) | 1 mm |
| 2020 | -- | 25°C (77°F) | 14 mm |
| 2019 | 29°C (85°F) | -- | 5 mm |
| 2018 | 31°C (88°F) | 26°C (79°F) | 0 mm |
| 2017 | -- | 26°C (78°F) | 6 mm |
| 2016 | 31°C (87°F) | 27°C (80°F) | 0 mm |
| 2015 | 29°C (84°F) | 23°C (74°F) | 147 mm |
| 2014 | 31°C (87°F) | 26°C (78°F) | 18 mm |
| 2013 | 30°C (86°F) | 25°C (77°F) | 23 mm |
| 2012 | 31°C (87°F) | 26°C (79°F) | 1 mm |
| 2011 | 30°C (86°F) | -- | 0 mm |
| 2010 | 31°C (87°F) | 26°C (79°F) | 0 mm |
| 2009 | 30°C (86°F) | 26°C (78°F) | 0 mm |
| 2006 | 17°C (63°F) | -- | 5 mm |
| 2004 | 18°C (64°F) | 14°C (58°F) | 3 mm |
| 2003 | 19°C (66°F) | 14°C (57°F) | -- |
| 2002 | 19°C (67°F) | 14°C (57°F) | -- |
| 2001 | 22°C (71°F) | 11°C (52°F) | -- |
| 2000 | 19°C (67°F) | 13°C (56°F) | -- |
| 1999 | 19°C (66°F) | 13°C (56°F) | -- |
| 1998 | 18°C (65°F) | 14°C (57°F) | 5 mm |
| 1997 | 21°C (69°F) | 12°C (53°F) | -- |
| 1996 | 18°C (65°F) | 13°C (56°F) | -- |
| 1995 | 23°C (73°F) | 12°C (53°F) | 5 mm |
| 1994 | 32°C (89°F) | -- | -- |
| 1993 | 21°C (69°F) | 11°C (52°F) | -- |
| 1992 | 19°C (67°F) | 14°C (57°F) | 2 mm |
| 1991 | 21°C (69°F) | 13°C (55°F) | -- |
| 1990 | -- | 14°C (58°F) | 0 mm |
| 1989 | -- | 13°C (56°F) | -- |
| 1988 | 19°C (67°F) | 12°C (53°F) | -- |
| 1987 | 23°C (73°F) | 11°C (51°F) | 0 mm |
| 1986 | 17°C (62°F) | 13°C (56°F) | 10 mm |
| 1985 | 17°C (62°F) | 13°C (55°F) | -- |
| 1984 | 20°C (68°F) | 11°C (51°F) | -- |
| 1983 | 19°C (67°F) | 12°C (53°F) | 3 mm |
| 1982 | 18°C (65°F) | 13°C (55°F) | -- |
| 1981 | 16°C (61°F) | 13°C (55°F) | -- |
| 1980 | -- | 26°C (79°F) | -- |
| 1979 | -- | 24°C (75°F) | -- |
| 1978 | -- | 26°C (79°F) | -- |
| 1977 | 17°C (63°F) | 14°C (57°F) | -- |
| 1976 | 19°C (66°F) | 14°C (57°F) | -- |
| 1975 | 18°C (64°F) | 13°C (55°F) | -- |
| 1974 | 16°C (61°F) | 13°C (55°F) | -- |
| 1973 | 22°C (72°F) | 11°C (51°F) | -- |
| 1972 | 17°C (63°F) | 13°C (55°F) | -- |
| 1971 | 22°C (71°F) | 11°C (51°F) | -- |