Weather on September 21 in Osaka
Historical weather data for September 21 in Osaka, Japan
Based on 52 years of data from OSAKA
About This Date
September 21st in Osaka, Japan typically brings warm fall weather, with average highs around 28°C and lows near 20°C. Over 52 years of records, the warmest September 21st was in 2010 (29°C average), while the coldest was 1971 (21°C) — a 15°F range across recorded history. Rain or other precipitation has occurred on about 27% of September 21st dates historically, with the wettest September 21st recording 5.74" of rain. The last decade has been 3.8°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.8°F cooler on this date compared to 20-30 years ago.
Planning for September 21st in Osaka? Stay hydrated and seek shade during peak afternoon hours.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2025 | 29°C (85°F) | 21°C (70°F) | -- |
| 2022 | -- | 19°C (67°F) | 0 mm |
| 2021 | -- | 22°C (71°F) | 0 mm |
| 2020 | 28°C (82°F) | -- | 0 mm |
| 2019 | 24°C (76°F) | 18°C (64°F) | 15 mm |
| 2018 | 27°C (81°F) | 20°C (68°F) | 146 mm |
| 2017 | 28°C (83°F) | 19°C (66°F) | 0 mm |
| 2016 | 27°C (80°F) | 21°C (69°F) | 112 mm |
| 2015 | 28°C (83°F) | 19°C (66°F) | 0 mm |
| 2014 | -- | 17°C (62°F) | 0 mm |
| 2013 | -- | 22°C (71°F) | 0 mm |
| 2012 | 29°C (84°F) | 22°C (71°F) | 1 mm |
| 2011 | 26°C (78°F) | -- | 109 mm |
| 2010 | 32°C (90°F) | 26°C (79°F) | -- |
| 2009 | 30°C (86°F) | 18°C (65°F) | 0 mm |
| 2008 | 28°C (83°F) | -- | 0 mm |
| 2007 | 32°C (90°F) | 24°C (76°F) | 0 mm |
| 2006 | 29°C (85°F) | 19°C (66°F) | 0 mm |
| 2004 | 33°C (92°F) | -- | 0 mm |
| 2003 | 22°C (72°F) | -- | 15 mm |
| 2002 | 31°C (88°F) | 22°C (71°F) | -- |
| 2001 | 24°C (76°F) | -- | -- |
| 2000 | 33°C (91°F) | 22°C (72°F) | -- |
| 1999 | 31°C (87°F) | -- | 69 mm |
| 1998 | 30°C (86°F) | 24°C (76°F) | 18 mm |
| 1997 | 28°C (82°F) | 19°C (67°F) | -- |
| 1996 | 25°C (77°F) | 20°C (68°F) | 0 mm |
| 1995 | 27°C (81°F) | 18°C (65°F) | -- |
| 1994 | 30°C (86°F) | 22°C (71°F) | 0 mm |
| 1993 | 23°C (74°F) | -- | -- |
| 1992 | 26°C (78°F) | -- | -- |
| 1991 | 29°C (85°F) | 21°C (69°F) | -- |
| 1990 | 29°C (84°F) | 17°C (63°F) | -- |
| 1989 | 27°C (81°F) | 17°C (63°F) | -- |
| 1988 | 30°C (86°F) | -- | -- |
| 1987 | 30°C (86°F) | 19°C (66°F) | -- |
| 1986 | 33°C (91°F) | 23°C (73°F) | 0 mm |
| 1985 | 31°C (88°F) | -- | 0 mm |
| 1984 | 28°C (83°F) | -- | -- |
| 1983 | 29°C (85°F) | 22°C (72°F) | -- |
| 1982 | 27°C (81°F) | -- | -- |
| 1981 | 29°C (84°F) | 18°C (64°F) | 0 mm |
| 1980 | 29°C (84°F) | 20°C (68°F) | 8 mm |
| 1979 | 32°C (90°F) | 23°C (73°F) | 1 mm |
| 1978 | 28°C (82°F) | 20°C (68°F) | 84 mm |
| 1977 | 30°C (86°F) | 19°C (66°F) | 0 mm |
| 1976 | 26°C (79°F) | -- | 10 mm |
| 1975 | -- | 24°C (75°F) | -- |
| 1974 | 25°C (77°F) | 16°C (61°F) | 18 mm |
| 1973 | 22°C (72°F) | -- | 0 mm |
| 1972 | 27°C (80°F) | 17°C (62°F) | 0 mm |
| 1971 | 22°C (72°F) | 19°C (67°F) | 90 mm |