Earliest and Latest Days of 20° C in Stornoway

This is a list of the earliest and latest days in the year with a high temperature of at least 20 °C in Stornoway, United Kingdom history. It is based on NOAA data from the years 1873–2024.

Also see:

Earliest 20 degree day in Stornoway?

The earliest in the year that Stornoway, United Kingdom had a high temperature of at least 20 °C is March 9 which happened in 1949.

Latest 20 degree day in Stornoway?

The latest in the year that Stornoway, United Kingdom had a high temperature of at least 20 °C is October 6 which happened in 1898.

Earliest Days ≥ 20 °C

Date	Year	Temperature
March 9	1949	20.0 °C
April 15	2003	20.0 °C
April 16	2003	20.5 °C
April 17	2003	20.8 °C
April 21	2011	20.2 °C
April 28	1984	20.3 °C
May 1	1990	20.5 °C
May 2	1990	20.3 °C
May 3	1990	20.0 °C
May 7	2008	20.4 °C
May 7	1895	20.6 °C
May 8	1896	20.0 °C
May 9	2016	20.4 °C
May 9	2008	20.3 °C
May 9	1896	21.1 °C
May 10	1896	20.6 °C
May 11	1896	22.2 °C
May 12	1980	20.7 °C
May 14	2019	20.3 °C
May 14	1992	21.3 °C
May 14	1982	21.6 °C

Latest Days ≥ 20 °C

Date	Year	Temperature
October 6	1898	20.6 °C
October 5	1898	21.1 °C
September 30	1895	20.6 °C
September 29	1895	20.0 °C
September 23	1901	20.0 °C
September 22	2006	20.1 °C
September 22	1901	20.0 °C
September 20	2019	20.8 °C
September 18	1926	21.7 °C
September 17	1898	20.0 °C
September 17	1880	20.6 °C
September 15	1934	20.0 °C
September 15	1900	20.0 °C
September 14	1883	20.0 °C
September 11	1915	20.0 °C
September 11	1896	20.0 °C
September 10	1915	20.0 °C
September 10	1907	20.6 °C
September 9	1971	21.9 °C
September 9	1915	20.6 °C
September 9	1914	21.1 °C
September 9	1895	20.0 °C