Reykjavik climate by month
Averages and records for each calendar month at Reykjavik, Iceland, from 2006 to 2025. The warmest month is July, averaging 14.5°C; the coolest is December at 2.7°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 2.9°C | −1.7°C | 9.8°C3 January 2019 | −14.5°C19 January 2024 | 19 / 19 |
| February | 3.4°C | −1.3°C | 10.0°C22 February 2019 | −14.1°C1 February 2008 | 17 / 19 |
| March | 4.2°C | −0.9°C | 10.2°C31 March 2007 | −14.8°C11 March 2023 | 19 / 19 |
| April | 7.0°C | 1.5°C | 16.4°C30 April 2019 | −8.9°C5 April 2021 | 19 / 19 |
| May | 9.9°C | 4.3°C | 20.4°C18 May 2025 | −5.3°C8 May 2015 | 19 / 19 |
| June | 12.6°C | 7.5°C | 21.4°C29 June 2020 | 1.0°C3 June 2025 | 19 / 19 |
| July | 14.5°C | 9.6°C | 25.1°C30 July 2008 | 3.4°C25 July 2020 | 19 / 19 |
| August | 13.9°C | 8.8°C | 23.8°C1 August 2008 | 2.5°C26 August 2024 | 18 / 19 |
| September | 11.0°C | 6.3°C | 18.2°C26 September 2019 | −3.0°C25 September 2020 | 18 / 19 |
| October | 7.5°C | 2.9°C | 14.8°C10 October 2010 | −6.9°C28 October 2008 | 19 / 19 |
| November | 4.9°C | 0.4°C | 12.4°C13 November 2022 | −12.9°C18 November 2006 | 18 / 19 |
| December | 2.7°C | −1.8°C | 10.6°C11 December 2009 | −14.2°C30 December 2022 | 19 / 19 |
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 19 years each.
See what Reykjavik 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.