Earliest and Latest Days of 20° C in Reykjavík

This is a list of the earliest and latest days in the year with a high temperature of at least 20 °C in Reykjavík, Iceland history. It is based on NOAA data from the years 1949–2024.

Also see:

Earliest 20 degree day in Reykjavík?

The earliest in the year that Reykjavík, Iceland had a high temperature of at least 20 °C is May 14 which happened in 1960.

Latest 20 degree day in Reykjavík?

The latest in the year that Reykjavík, Iceland had a high temperature of at least 20 °C is August 25 which happened in 2015.

Earliest Days ≥ 20 °C

Date	Year	Temperature
May 14	1960	20.6 °C
June 2	1955	20.5 °C
June 6	1954	20.7 °C
June 11	2002	22.4 °C
June 14	2019	21.1 °C
June 20	1949	20.2 °C
June 21	2004	20.3 °C
June 22	2004	20.2 °C
June 22	1949	20.4 °C
June 29	2020	21.4 °C
July 3	1995	20.5 °C
July 4	1995	20.5 °C
July 6	1991	20.0 °C
July 7	1991	22.1 °C
July 8	1960	20.1 °C
July 9	1991	23.2 °C
July 9	1976	24.3 °C
July 9	1960	20.4 °C
July 10	1976	24.2 °C
July 12	2009	21.1 °C

Latest Days ≥ 20 °C

Date	Year	Temperature
August 25	2015	20.7 °C
August 17	2012	20.4 °C
August 16	2020	20.5 °C
August 16	2012	21.3 °C
August 12	2004	22.2 °C
August 11	2004	24.8 °C
August 10	2021	20.3 °C
August 10	2004	20.9 °C
August 9	2004	20.7 °C
August 5	2011	20.0 °C
August 2	2008	23.6 °C
August 1	2008	23.5 °C
August 1	2003	20.0 °C
July 31	2008	23.4 °C
July 31	1991	20.7 °C
July 31	1980	23.0 °C
July 30	2008	25.7 °C
July 30	1980	23.7 °C
July 29	2021	20.9 °C
July 29	2018	23.5 °C
July 29	2008	22.5 °C