Earliest and Latest Days of 20° C in Oshawa

This is a list of the earliest and latest days in the year with a high temperature of at least 20 °C in Oshawa, Ontario history. It is based on NOAA data from the years 1882–2024.

Also see:

Earliest 20 degree day in Oshawa?

The earliest in the year that Oshawa, Ontario had a high temperature of at least 20 °C is March 13 which happened in 1990.

Latest 20 degree day in Oshawa?

The latest in the year that Oshawa, Ontario had a high temperature of at least 20 °C is November 5 which happened in 2022.

Earliest Days ≥ 20 °C

Date	Year	Temperature
March 13	1990	20.0 °C
March 19	2012	21.4 °C
March 20	2012	20.9 °C
March 21	2012	22.4 °C
March 22	2012	23.3 °C
March 25	2000	20.5 °C
March 30	1986	23.5 °C
March 31	1998	20.0 °C
April 8	2021	22.6 °C
April 8	2001	24.5 °C
April 10	2021	21.2 °C
April 10	2017	20.0 °C
April 10	1955	20.6 °C
April 11	2011	22.2 °C
April 11	1955	20.0 °C
April 12	2001	22.0 °C
April 12	1977	20.0 °C
April 14	1958	20.0 °C
April 14	1886	20.6 °C
April 15	1994	20.5 °C
April 15	1958	20.6 °C

Latest Days ≥ 20 °C

Date	Year	Temperature
November 5	2022	23.0 °C
November 2	2016	20.6 °C
November 2	1971	21.1 °C
October 30	1971	20.0 °C
October 28	1984	21.0 °C
October 28	1971	20.6 °C
October 27	2023	20.4 °C
October 25	2022	20.3 °C
October 25	2012	21.3 °C
October 24	1993	20.0 °C
October 24	1975	20.0 °C
October 23	2020	22.2 °C
October 23	1954	21.1 °C
October 22	2017	21.5 °C
October 22	2007	20.0 °C
October 22	1979	21.0 °C
October 21	1914	21.7 °C
October 20	1995	21.0 °C
October 19	2021	21.4 °C
October 19	2017	20.7 °C
October 19	2007	20.0 °C
October 19	1953	21.1 °C