Halli Arpt climate by month
Averages and records for each calendar month at Halli Arpt, Finland, from 2008 to 2026. The warmest month is July, averaging 22.8°C; the coolest is January at −4.5°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −4.5°C | −10.1°C | 8.3°C16 January 2025 | −31.1°C22 January 2016 | 18 / 18 |
| February | −2.8°C | −8.8°C | 8.8°C23 February 2019 | −32.9°C18 February 2011 | 17 / 17 |
| March | 2.0°C | −6.1°C | 14.4°C20 March 2022 | −26.5°C1 March 2018 | 17 / 17 |
| April | 8.3°C | −1.3°C | 21.1°C25 April 2011 | −14.5°C1 April 2018 | 17 / 17 |
| May | 16.2°C | 4.8°C | 29.7°C24 May 2014 | −5.3°C11 May 2017 | 17 / 17 |
| June | 20.6°C | 10.0°C | 33.4°C22 June 2021 | −1.2°C4 June 2017 | 17 / 17 |
| July | 22.8°C | 12.9°C | 33.4°C29 July 2010 | 1.7°C6 July 2009 | 17 / 17 |
| August | 20.7°C | 11.5°C | 32.4°C1 August 2018 | 2.5°C10 August 2012 | 17 / 17 |
| September | 15.1°C | 7.6°C | 26.4°C5 September 2024 | −2.9°C22 September 2021 | 17 / 17 |
| October | 7.5°C | 2.1°C | 18.5°C14 October 2018 | −10.9°C29 October 2023 | 18 / 18 |
| November | 2.5°C | −1.4°C | 12.5°C12 November 2022 | −22.5°C29 November 2010 | 18 / 18 |
| December | −1.6°C | −6.0°C | 9.9°C20 December 2015 | −30.5°C24 December 2010 | 18 / 18 |
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 17 to 18 years each.
See what Halli Arpt 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.