Ostrava/Janáček Arpt climate by month
Averages and records for each calendar month at Ostrava/Janáček Arpt, Czechia, from 1953 to 2025. The warmest month is July, averaging 24.3°C; the coolest is January at 1.9°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 1.9°C | −4.1°C | 14.2°C12 January 1993 | −29.3°C7 January 1985 | 23 / 63 |
| February | 3.4°C | −1.6°C | 17.3°C25 February 1990 | −27.8°C9 February 1956 | 19 / 64 |
| March | 8.3°C | −0.8°C | 23.0°C21 March 1974 | −26.1°C1 March 1963 | 39 / 64 |
| April | 13.9°C | 2.3°C | 29.0°C30 April 2012 | −8.0°C11 April 1977 | 40 / 64 |
| May | 19.4°C | 7.0°C | 32.2°C27 May 1958 | −3.0°C4 May 1980 | 46 / 64 |
| June | 22.2°C | 10.2°C | 35.0°C28 June 1963 | 1.0°C2 June 1977 | 42 / 63 |
| July | 24.3°C | 12.0°C | 36.7°C30 July 1994 | 4.2°C11 July 2015 | 45 / 64 |
| August | 24.1°C | 11.6°C | 36.9°C10 August 1992 | 3.8°C7 August 1987 | 42 / 63 |
| September | 19.5°C | 8.2°C | 31.1°C3 September 1956 | −2.2°C26 September 1959 | 38 / 62 |
| October | 13.9°C | 4.6°C | 26.2°C5 October 1985 | −7.6°C25 October 2003 | 42 / 62 |
| November | 6.9°C | −0.1°C | 21.1°C6 November 1963 | −18.7°C23 November 1988 | 24 / 62 |
| December | 2.4°C | −2.4°C | 20.0°C3 December 1979 | −25.8°C29 December 1996 | 19 / 62 |
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 19 to 46 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.