Choshi climate by month
Averages and records for each calendar month at Choshi, Japan, from 1931 to 2026. The warmest month is August, averaging 28.1°C; the coolest is February at 9.8°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 9.9°C | 1.9°C | 23.6°C27 January 1969 | −6.2°C17 January 1970 | 90 / 96 |
| February | 9.8°C | 2.4°C | 24.0°C14 February 2009 | −6.1°C4 February 1945 | 78 / 96 |
| March | 12.1°C | 5.3°C | 23.7°C26 March 2025 | −3.6°C6 March 1977 | 83 / 96 |
| April | 16.3°C | 10.1°C | 25.9°C20 April 1956 | 0.4°C3 April 1952 | 82 / 96 |
| May | 20.0°C | 14.0°C | 29.5°C25 May 1963 | 5.7°C3 May 1953 | 88 / 96 |
| June | 22.5°C | 17.2°C | 32.0°C30 June 2022 | 10.5°C13 June 1966 | 88 / 96 |
| July | 26.1°C | 20.7°C | 34.8°C27 July 2005 | 10.5°C3 July 2026 | 89 / 96 |
| August | 28.1°C | 22.8°C | 35.3°C4 August 1962 | 17.0°C13 August 1970 | 88 / 96 |
| September | 25.5°C | 20.7°C | 33.7°C3 September 2000 | 12.4°C28 September 1992 | 87 / 96 |
| October | 21.0°C | 15.8°C | 30.6°C7 October 2018 | 5.9°C31 October 1984 | 84 / 95 |
| November | 16.9°C | 10.3°C | 24.8°C1 November 1977 | 0.9°C29 November 1951 | 81 / 95 |
| December | 12.4°C | 4.7°C | 23.4°C5 December 2004 | −3.9°C30 December 1947 | 85 / 95 |
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 78 to 90 years each.
See what Choshi is doing right now
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.