Osaka climate by month
Averages and records for each calendar month at Osaka, Japan, from 1953 to 2026. The warmest month is August, averaging 33.3°C; the coolest is January at 9.3°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 9.3°C | 3.5°C | 19.1°C28 January 2020 | −4.4°C9 January 1956 | 59 / 65 |
| February | 10.1°C | 3.8°C | 23.9°C27 February 1954 | −7.9°C28 February 1984 | 58 / 65 |
| March | 13.7°C | 7.2°C | 24.5°C27 March 2025 | −3.3°C8 March 1963 | 58 / 65 |
| April | 19.9°C | 13.3°C | 29.9°C28 April 2012 | −0.6°C4 April 1957 | 59 / 65 |
| May | 24.5°C | 16.7°C | 36.0°C24 May 1980 | 5.6°C3 May 1957 | 58 / 64 |
| June | 27.7°C | 21.1°C | 37.0°C14 June 1978 | 11.1°C4 June 1957 | 59 / 65 |
| July | 31.7°C | 25.0°C | 38.4°C1 July 2022 | 14.1°C3 July 2026 | 58 / 65 |
| August | 33.3°C | 27.0°C | 39.1°C8 August 1994 | 16.1°C20 August 1956 | 58 / 65 |
| September | 29.2°C | 25.1°C | 36.2°C5 September 2010 | 12.0°C14 September 1973 | 57 / 65 |
| October | 23.3°C | 18.5°C | 33.1°C1 October 2019 | 5.0°C28 October 1958 | 56 / 64 |
| November | 17.5°C | 10.3°C | 27.2°C1 November 1964 | −0.6°C29 November 1953 | 57 / 64 |
| December | 12.2°C | 6.0°C | 24.5°C4 December 2018 | −2.8°C25 December 1956 | 56 / 63 |
Years shows the number behind the average high, then the number holding a record for that month. They differ because a year contributes an average only when the month has at least 25 days of readings, while a single reading is enough to set a record. The average low is withheld on the same 25-day rule and is counted separately again; it is shown as a dash where the archive cannot support it. Across the twelve months here the averages rest on 56 to 59 years each.
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Every figure on this page is computed from NOAA GHCN-Daily observations stored per station, per year, per month. Nothing is modelled, interpolated or estimated, and a month the archive never covered is left out rather than filled in. A station appears here only once all twelve months carry an average from at least 10 years. See how this is built.