Sofia Observ. climate by month
Averages and records for each calendar month at Sofia Observ., Bulgaria, from 1952 to 2025. The warmest month is August, averaging 26.4°C; the coolest is January at 3.0°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 3.0°C | −4.2°C | 17.8°C19 January 2007 | −21.8°C13 January 1985 | 28 / 68 |
| February | 6.5°C | −4.1°C | 22.0°C23 February 1977 | −23.9°C6 February 1956 | 13 / 68 |
| March | 10.7°C | 0.7°C | 27.5°C25 March 2001 | −16.1°C6 March 1955 | 27 / 68 |
| April | 15.7°C | 4.8°C | 30.3°C5 April 1989 | −5.4°C10 April 1997 | 24 / 68 |
| May | 20.2°C | 9.2°C | 34.1°C15 May 2020 | −2.0°C13 May 1978 | 29 / 68 |
| June | 23.4°C | 12.2°C | 37.2°C27 June 1982 | 1.4°C12 June 1992 | 24 / 68 |
| July | 26.2°C | 13.9°C | 39.2°C4 July 2000 | 4.5°C18 July 1983 | 25 / 68 |
| August | 26.4°C | 13.6°C | 39.4°C18 August 1993 | 4.0°C29 August 1981 | 25 / 68 |
| September | 23.0°C | 10.5°C | 36.1°C1 September 1952 | −1.4°C27 September 2018 | 23 / 67 |
| October | 17.1°C | 5.7°C | 33.9°C2 October 1952 | −6.0°C30 October 1973 | 28 / 67 |
| November | 9.0°C | 1.1°C | 25.8°C5 November 2021 | −15.0°C27 November 1975 | 23 / 67 |
| December | 4.3°C | −2.3°C | 20.1°C27 December 1995 | −19.5°C18 December 1988 | 21 / 67 |
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 13 to 29 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.