Weather on September 21 in Istanbul
Historical weather data for September 21 in Istanbul, Turkey
Based on 55 years of data from ISTANBUL
About This Date
September 21st in Istanbul, Turkey typically brings pleasant fall weather, with average highs around 24°C and lows near 16°C. Over 55 years of records, the warmest September 21st was in 1984 (26°C average), while the coldest was 1971 (16°C) — a 19°F range across recorded history. Rain or other precipitation has occurred on about 15% of September 21st dates historically, with the wettest September 21st recording 1.75" 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 September 21st in Istanbul? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip |
|---|---|---|---|
| 2025 | 27°C (80°F) | 13°C (55°F) | 0" |
| 2024 | 25°C (77°F) | -- | 0" |
| 2023 | 28°C (83°F) | 17°C (63°F) | -- |
| 2022 | 24°C (76°F) | 17°C (62°F) | 0" |
| 2021 | 23°C (74°F) | -- | -- |
| 2020 | -- | 20°C (68°F) | 0" |
| 2019 | -- | 14°C (57°F) | -- |
| 2018 | 28°C (83°F) | 20°C (68°F) | 0" |
| 2017 | 32°C (89°F) | 17°C (62°F) | 0" |
| 2016 | 19°C (67°F) | -- | 1.04" |
| 2015 | 29°C (84°F) | 19°C (67°F) | 0" |
| 2014 | 24°C (75°F) | 17°C (62°F) | 0" |
| 2013 | 24°C (75°F) | -- | 0" |
| 2012 | 19°C (67°F) | -- | 0.08" |
| 2011 | 30°C (86°F) | 17°C (62°F) | 0.3" |
| 2010 | 22°C (72°F) | -- | 0" |
| 2009 | 21°C (69°F) | 12°C (54°F) | 0" |
| 2008 | -- | 14°C (57°F) | 1.75" |
| 2007 | -- | 16°C (60°F) | 0" |
| 2006 | 21°C (70°F) | 17°C (63°F) | 0.08" |
| 2005 | 29°C (84°F) | 17°C (63°F) | 0" |
| 2004 | 27°C (81°F) | 14°C (58°F) | 0" |
| 2003 | 24°C (76°F) | 14°C (57°F) | -- |
| 2002 | 22°C (72°F) | 14°C (57°F) | -- |
| 2001 | 26°C (78°F) | 18°C (64°F) | -- |
| 2000 | 31°C (88°F) | 20°C (68°F) | -- |
| 1999 | 23°C (73°F) | 17°C (62°F) | -- |
| 1998 | 22°C (72°F) | 18°C (64°F) | -- |
| 1997 | 20°C (68°F) | 14°C (57°F) | -- |
| 1996 | 22°C (71°F) | 16°C (60°F) | 0" |
| 1995 | 24°C (75°F) | 13°C (56°F) | -- |
| 1994 | 28°C (82°F) | 23°C (73°F) | -- |
| 1993 | 19°C (67°F) | 13°C (55°F) | 0.2" |
| 1992 | 23°C (73°F) | 13°C (55°F) | -- |
| 1991 | 22°C (71°F) | 14°C (57°F) | 0.7" |
| 1990 | 23°C (74°F) | 11°C (52°F) | -- |
| 1989 | 24°C (76°F) | 18°C (64°F) | -- |
| 1988 | 25°C (77°F) | 14°C (57°F) | -- |
| 1987 | 28°C (82°F) | 17°C (62°F) | -- |
| 1986 | 22°C (71°F) | 17°C (62°F) | -- |
| 1985 | 28°C (83°F) | 14°C (58°F) | -- |
| 1984 | 33°C (91°F) | 19°C (66°F) | -- |
| 1983 | 22°C (72°F) | 17°C (62°F) | 0" |
| 1982 | 27°C (80°F) | 17°C (62°F) | -- |
| 1981 | 27°C (80°F) | 15°C (59°F) | -- |
| 1980 | 24°C (75°F) | 13°C (55°F) | -- |
| 1979 | 24°C (76°F) | 17°C (62°F) | -- |
| 1978 | 21°C (69°F) | 14°C (58°F) | -- |
| 1977 | 32°C (89°F) | 15°C (59°F) | -- |
| 1976 | 22°C (71°F) | 12°C (53°F) | 0.1" |
| 1975 | 25°C (77°F) | 16°C (61°F) | -- |
| 1974 | 26°C (78°F) | 14°C (57°F) | -- |
| 1973 | 23°C (73°F) | 17°C (62°F) | -- |
| 1972 | 24°C (76°F) | 14°C (58°F) | -- |
| 1971 | 21°C (69°F) | 10°C (50°F) | -- |