Kushiro climate by month
Averages and records for each calendar month at Kushiro, Japan, from 1951 to 2025. The warmest month is August, averaging 21.3°C; the coolest is January at −0.9°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −0.9°C | −12.5°C | 7.6°C13 January 1964 | −25.4°C9 January 1953 | 67 / 74 |
| February | −0.8°C | −11.9°C | 7.9°C16 February 1989 | −25.2°C10 February 1953 | 61 / 74 |
| March | 2.5°C | −6.2°C | 15.9°C28 March 2015 | −23.4°C6 March 1965 | 65 / 74 |
| April | 7.9°C | −0.2°C | 23.5°C28 April 1983 | −12.1°C1 April 1953 | 64 / 74 |
| May | 12.4°C | 4.2°C | 28.0°C19 May 1966 | −4.6°C3 May 1953 | 62 / 74 |
| June | 15.3°C | 8.3°C | 32.4°C26 June 2010 | −0.4°C15 June 1985 | 60 / 74 |
| July | 19.1°C | 12.6°C | 33.5°C31 July 2022 | 4.7°C4 July 1968 | 65 / 74 |
| August | 21.3°C | 15.0°C | 31.1°C11 August 2011 | 6.8°C16 August 1955 | 64 / 74 |
| September | 19.5°C | 11.3°C | 29.0°C2 September 2010 | 0.5°C29 September 1969 | 63 / 73 |
| October | 14.8°C | 4.5°C | 22.9°C1 October 2012 | −5.8°C31 October 1964 | 66 / 73 |
| November | 8.4°C | −1.8°C | 17.9°C3 November 1959 | −14.5°C26 November 1953 | 58 / 73 |
| December | 2.4°C | −7.3°C | 12.4°C9 December 1954 | −22.1°C30 December 1969 | 64 / 73 |
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 58 to 67 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.