Weather on September 21 in Shanghai
Historical weather data for September 21 in Shanghai, China
Based on 53 years of data from SHANGHAI/HONGQIAO
About This Date
September 21st in Shanghai, China typically brings pleasant fall weather, with average highs around 26°C and lows near 20°C. Over 53 years of records, the warmest September 21st was in 2010 (32°C average), while the coldest was 1974 (18°C) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 42% of September 21st dates historically, with the wettest September 21st recording 6.61" of rain. The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
Planning for September 21st in Shanghai? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip |
|---|---|---|---|
| 2025 | 26°C (79°F) | 23°C (74°F) | -- |
| 2024 | 28°C (83°F) | 22°C (71°F) | 0.23" |
| 2022 | 25°C (77°F) | 17°C (63°F) | 0" |
| 2021 | 33°C (92°F) | 22°C (71°F) | 0.03" |
| 2020 | 28°C (83°F) | 19°C (67°F) | 0" |
| 2019 | -- | 19°C (67°F) | 2.84" |
| 2017 | -- | 19°C (67°F) | 0.03" |
| 2016 | -- | 19°C (67°F) | 0.05" |
| 2015 | -- | 19°C (66°F) | -- |
| 2014 | 27°C (80°F) | 22°C (71°F) | 0" |
| 2013 | -- | 24°C (76°F) | 1.93" |
| 2012 | 27°C (80°F) | 23°C (73°F) | 0" |
| 2011 | 23°C (74°F) | 17°C (62°F) | 0" |
| 2010 | 35°C (95°F) | 28°C (82°F) | 0" |
| 2009 | 24°C (76°F) | 21°C (70°F) | 1.08" |
| 2008 | 30°C (86°F) | 25°C (77°F) | 0.94" |
| 2007 | 26°C (78°F) | 22°C (72°F) | 0.01" |
| 2006 | 27°C (81°F) | 18°C (65°F) | 0" |
| 2005 | 36°C (96°F) | 25°C (77°F) | 0.34" |
| 2004 | 23°C (74°F) | 18°C (65°F) | 0.36" |
| 2003 | 26°C (78°F) | 19°C (66°F) | 0" |
| 2002 | 26°C (78°F) | 22°C (72°F) | 0" |
| 2001 | 27°C (81°F) | 23°C (73°F) | 0" |
| 2000 | 25°C (77°F) | 21°C (69°F) | 0.28" |
| 1999 | 24°C (75°F) | 20°C (68°F) | 0" |
| 1998 | 26°C (78°F) | 19°C (67°F) | 0.07" |
| 1997 | 25°C (77°F) | 21°C (69°F) | 0" |
| 1996 | 27°C (80°F) | 19°C (67°F) | 0" |
| 1995 | 26°C (79°F) | 17°C (63°F) | 0" |
| 1994 | 26°C (79°F) | 20°C (68°F) | 0.12" |
| 1993 | 23°C (73°F) | 19°C (67°F) | 6.61" |
| 1992 | 27°C (80°F) | 23°C (74°F) | 0" |
| 1991 | 27°C (81°F) | 16°C (60°F) | 0" |
| 1990 | 28°C (83°F) | 18°C (64°F) | 0" |
| 1989 | 23°C (73°F) | 19°C (66°F) | 0.13" |
| 1988 | 27°C (80°F) | 20°C (68°F) | 0" |
| 1987 | 28°C (82°F) | 18°C (65°F) | 0" |
| 1986 | 26°C (79°F) | 16°C (60°F) | 0" |
| 1985 | 26°C (78°F) | 22°C (72°F) | 0.34" |
| 1984 | 28°C (82°F) | 21°C (70°F) | 0" |
| 1983 | 29°C (84°F) | 20°C (68°F) | 0" |
| 1982 | 25°C (77°F) | 20°C (68°F) | 0" |
| 1981 | 27°C (80°F) | 21°C (70°F) | 0" |
| 1980 | 22°C (71°F) | 18°C (64°F) | 0.6" |
| 1979 | 31°C (87°F) | 23°C (74°F) | 0" |
| 1978 | 26°C (78°F) | 20°C (68°F) | 0" |
| 1977 | 22°C (72°F) | 18°C (64°F) | 0" |
| 1976 | 22°C (72°F) | 18°C (65°F) | 0.04" |
| 1975 | 28°C (83°F) | 24°C (75°F) | 0" |
| 1974 | 21°C (69°F) | 16°C (60°F) | 0.47" |
| 1973 | 27°C (80°F) | 17°C (63°F) | 0.02" |
| 1972 | 27°C (81°F) | 18°C (64°F) | 0" |
| 1971 | 23°C (73°F) | 19°C (67°F) | 1.59" |