Earliest and Latest Days of 25° C in Oshawa

This is a list of the earliest and latest days in the year with a high temperature of at least 25 °C in Oshawa, Ontario history. It is based on NOAA data from the years 1882–2024.

Also see:

Earliest 25 degree day in Oshawa?

The earliest in the year that Oshawa, Ontario had a high temperature of at least 25 °C is April 14 which happened in 2023.

Latest 25 degree day in Oshawa?

The latest in the year that Oshawa, Ontario had a high temperature of at least 25 °C is October 10 which has happened twice, most recently in 2018.

Earliest Days ≥ 25 °C

Date	Year	Temperature
April 14	2023	25.3 °C
April 15	2023	26.6 °C
April 16	2012	25.4 °C
April 18	2002	25.0 °C
April 19	2002	25.5 °C
April 21	1987	25.0 °C
April 22	1985	26.0 °C
April 25	1990	29.5 °C
April 25	1925	25.6 °C
April 25	1915	26.7 °C
April 26	1990	25.0 °C
April 26	1915	26.1 °C
April 27	2017	25.2 °C
April 27	1915	26.7 °C
April 28	1990	27.0 °C
April 29	1955	25.0 °C
May 3	2001	25.0 °C
May 3	1980	26.0 °C
May 3	1886	25.0 °C
May 4	2001	27.0 °C
May 4	1955	25.0 °C

Latest Days ≥ 25 °C

Date	Year	Temperature
October 10	2018	25.7 °C
October 10	2011	25.1 °C
October 9	2018	25.5 °C
October 4	2023	27.3 °C
October 4	1954	25.6 °C
October 4	1891	26.1 °C
October 4	1884	27.2 °C
October 3	2023	27.3 °C
October 3	1891	26.1 °C
October 1	2023	26.2 °C
October 1	2019	28.2 °C
October 1	1954	25.6 °C
September 30	1954	25.6 °C
September 29	1885	25.0 °C
September 28	2020	25.1 °C
September 28	1885	26.7 °C
September 27	2017	29.1 °C
September 27	2014	25.0 °C
September 27	1923	25.6 °C
September 27	1885	26.7 °C