Earliest and Latest Days of 20° C in Oslo

This is a list of the earliest and latest days in the year with a high temperature of at least 20 °C in Oslo, Norway history. It is based on NOAA data from the years 1937–2024.

Also see:

Earliest 20 degree day in Oslo?

The earliest in the year that Oslo, Norway had a high temperature of at least 20 °C is March 26 which happened in 2017.

Latest 20 degree day in Oslo?

The latest in the year that Oslo, Norway had a high temperature of at least 20 °C is October 9 which happened in 1969.

Earliest Days ≥ 20 °C

Date	Year	Temperature
March 26	2017	20.0 °C
March 27	2012	21.5 °C
April 11	2011	20.1 °C
April 14	1989	20.8 °C
April 18	2011	20.2 °C
April 20	2019	20.2 °C
April 20	2015	22.8 °C
April 21	2020	20.8 °C
April 21	2015	20.0 °C
April 22	2020	21.9 °C
April 22	2003	20.5 °C
April 23	2019	20.0 °C
April 23	2011	20.0 °C
April 24	2019	20.1 °C
April 24	2002	20.5 °C
April 24	1995	21.2 °C
April 25	1993	21.0 °C
April 26	2019	20.1 °C
April 26	1993	24.7 °C
April 27	2019	20.0 °C
April 27	2014	22.2 °C
April 27	1993	25.1 °C
April 27	1961	20.2 °C
April 27	1946	21.5 °C

Latest Days ≥ 20 °C

Date	Year	Temperature
October 9	1969	21.0 °C
October 7	1944	20.1 °C
September 30	2011	21.0 °C
September 29	2011	21.9 °C
September 29	1948	20.2 °C
September 28	1949	20.9 °C
September 26	2018	20.2 °C
September 26	2009	20.4 °C
September 25	2006	20.2 °C
September 24	1997	20.8 °C
September 23	1994	20.8 °C
September 22	2009	21.2 °C
September 22	2006	20.4 °C
September 22	1998	20.4 °C
September 21	2019	22.5 °C
September 21	2006	20.8 °C
September 21	1998	20.0 °C
September 20	2016	21.6 °C
September 20	1966	21.1 °C
September 20	1941	20.6 °C
September 20	1939	20.0 °C