Hakodate climate by month
Averages and records for each calendar month at Hakodate, Japan, from 1951 to 2026. The warmest month is August, averaging 25.7°C; the coolest is January at 0.3°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 0.3°C | −7.4°C | 9.9°C23 January 2009 | −17.9°C20 January 1966 | 68 / 75 |
| February | 1.1°C | −7.1°C | 13.4°C22 February 2026 | −17.5°C12 February 1967 | 61 / 75 |
| March | 5.0°C | −3.2°C | 16.6°C28 March 2018 | −15.2°C6 March 1958 | 66 / 75 |
| April | 11.6°C | 2.2°C | 23.0°C28 April 2015 | −8.0°C1 April 1978 | 68 / 75 |
| May | 16.8°C | 6.9°C | 28.0°C26 May 2019 | −1.7°C4 May 1977 | 69 / 75 |
| June | 19.8°C | 11.5°C | 29.1°C7 June 1987 | 3.6°C3 June 1983 | 68 / 75 |
| July | 23.6°C | 16.3°C | 32.6°C26 July 1976 | 6.8°C1 July 1967 | 68 / 75 |
| August | 25.7°C | 18.2°C | 35.4°C10 August 2023 | 10.2°C27 August 1976 | 68 / 75 |
| September | 22.4°C | 13.3°C | 32.6°C18 September 2012 | 2.8°C30 September 1969 | 65 / 75 |
| October | 16.7°C | 6.4°C | 25.7°C3 October 2025 | −2.7°C31 October 1975 | 67 / 74 |
| November | 9.5°C | 0.7°C | 20.7°C2 November 2003 | −9.7°C28 November 1951 | 60 / 74 |
| December | 3.1°C | −4.2°C | 16.3°C1 December 1990 | −14.1°C23 December 1952 | 59 / 74 |
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 59 to 69 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.