Lappeenranta Arpt climate by month
Averages and records for each calendar month at Lappeenranta Arpt, Finland, from 1959 to 2026. The warmest month is July, averaging 22.0°C; the coolest is January at −5.2°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −5.2°C | −11.0°C | 7.5°C15 January 2020 | −36.8°C10 January 1987 | 67 / 67 |
| February | −4.7°C | −10.8°C | 7.5°C21 February 1990 | −33.3°C3 February 1966 | 67 / 67 |
| March | 0.6°C | −6.6°C | 14.8°C28 March 2007 | −28.0°C19 March 1963 | 67 / 67 |
| April | 7.3°C | −1.1°C | 24.0°C24 April 2000 | −16.8°C3 April 1965 | 66 / 67 |
| May | 15.1°C | 4.9°C | 30.7°C19 May 2014 | −6.2°C2 May 1995 | 67 / 67 |
| June | 19.9°C | 10.1°C | 32.7°C23 June 2021 | −1.2°C2 June 2003 | 67 / 68 |
| July | 22.0°C | 12.8°C | 34.6°C28 July 2010 | 4.4°C7 July 1964 | 68 / 68 |
| August | 19.8°C | 11.5°C | 33.6°C7 August 2010 | 1.7°C25 August 1987 | 68 / 68 |
| September | 13.8°C | 6.9°C | 27.1°C2 September 1963 | −5.0°C30 September 1993 | 67 / 67 |
| October | 7.0°C | 1.8°C | 19.2°C14 October 2018 | −12.1°C31 October 1988 | 66 / 66 |
| November | 1.3°C | −2.8°C | 12.5°C12 November 2022 | −21.1°C30 November 1980 | 66 / 66 |
| December | −2.6°C | −7.7°C | 9.2°C21 December 2015 | −30.8°C30 December 1978 | 66 / 66 |
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 68 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.