Ullungdo climate by month
Averages and records for each calendar month at Ullungdo, South Korea, from 1939 to 2026. The warmest month is August, averaging 27.0°C; the coolest is January at 3.8°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 3.8°C | −1.5°C | 14.9°C1 January 1997 | −11.6°C12 January 1943 | 78 / 88 |
| February | 4.4°C | −1.1°C | 19.2°C14 February 1996 | −13.6°C26 February 1981 | 74 / 88 |
| March | 8.6°C | 2.1°C | 21.8°C29 March 1998 | −9.9°C3 March 1951 | 80 / 88 |
| April | 14.5°C | 7.3°C | 26.1°C19 April 2001 | −2.7°C3 April 1962 | 80 / 88 |
| May | 19.1°C | 12.1°C | 29.7°C31 May 2026 | 1.0°C8 May 2006 | 81 / 88 |
| June | 22.1°C | 15.9°C | 34.5°C17 June 2007 | 7.0°C9 June 1945 | 80 / 88 |
| July | 25.4°C | 20.1°C | 39.7°C26 July 2007 | 12.5°C1 July 1949 | 80 / 88 |
| August | 27.0°C | 21.6°C | 35.4°C8 August 2013 | 14.7°C17 August 1956 | 81 / 88 |
| September | 23.1°C | 17.5°C | 32.4°C1 September 1997 | 8.9°C29 September 1981 | 78 / 88 |
| October | 18.7°C | 12.4°C | 27.2°C5 October 1941 | 0.7°C31 October 1997 | 79 / 87 |
| November | 13.0°C | 7.0°C | 23.2°C2 November 1979 | −5.9°C29 November 1970 | 76 / 87 |
| December | 7.2°C | 1.6°C | 17.9°C1 December 1953 | −9.6°C26 December 1976 | 72 / 87 |
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 72 to 81 years each.
See what Ullungdo 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.