Mikkeli Arpt climate by month
Averages and records for each calendar month at Mikkeli Arpt, Finland, from 1959 to 2026. The warmest month is July, averaging 21.8°C; the coolest is January at −5.5°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −5.5°C | −12.0°C | 7.1°C15 January 2020 | −37.1°C30 January 1967 | 67 / 68 |
| February | −4.6°C | −11.7°C | 8.5°C23 February 1990 | −37.5°C1 February 1967 | 66 / 67 |
| March | 0.7°C | −7.9°C | 15.0°C19 March 1990 | −36.3°C19 March 1963 | 67 / 67 |
| April | 7.1°C | −2.2°C | 23.8°C25 April 2001 | −24.4°C3 April 1960 | 67 / 67 |
| May | 15.1°C | 3.5°C | 30.2°C24 May 2014 | −8.3°C3 May 1999 | 67 / 67 |
| June | 19.8°C | 8.6°C | 33.1°C22 June 2021 | −4.9°C6 June 1962 | 67 / 67 |
| July | 21.8°C | 11.2°C | 32.7°C13 July 2010 | 0.0°C3 July 1967 | 67 / 67 |
| August | 19.6°C | 9.8°C | 33.2°C8 August 2010 | −3.1°C29 August 1966 | 67 / 67 |
| September | 13.6°C | 5.4°C | 27.0°C6 September 2024 | −6.8°C21 September 2002 | 67 / 67 |
| October | 6.8°C | 1.1°C | 19.9°C14 October 2018 | −16.3°C20 October 2002 | 67 / 67 |
| November | 1.0°C | −3.4°C | 11.8°C12 November 2022 | −26.5°C30 November 1964 | 67 / 67 |
| December | −3.1°C | −8.7°C | 9.7°C21 December 2015 | −33.0°C30 December 1978 | 66 / 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 66 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.