Earliest and Latest Days of 20° C in Williams Lake

This is a list of the earliest and latest days in the year with a high temperature of at least 20 °C in Williams Lake, British Columbia history. It is based on NOAA data from the years 1939–2024.

Also see:

Earliest 20 degree day in Williams Lake?

The earliest in the year that Williams Lake, British Columbia had a high temperature of at least 20 °C is March 29 which happened in 1941.

Latest 20 degree day in Williams Lake?

The latest in the year that Williams Lake, British Columbia had a high temperature of at least 20 °C is October 29 which happened in 1944.

Earliest Days ≥ 20 °C

Date	Year	Temperature
March 29	1941	21.1 °C
March 30	1941	20.6 °C
March 31	1942	20.6 °C
April 1	2016	20.4 °C
April 2	1992	21.4 °C
April 2	1941	22.8 °C
April 5	1977	20.1 °C
April 5	1966	20.0 °C
April 7	2007	20.7 °C
April 7	1986	21.5 °C
April 7	1977	21.2 °C
April 8	2016	21.8 °C
April 10	1942	21.7 °C
April 11	2004	22.3 °C
April 11	1943	22.8 °C
April 12	2004	20.4 °C
April 12	1980	20.2 °C
April 12	1947	21.1 °C
April 12	1943	23.9 °C
April 13	1947	21.7 °C
April 13	1943	26.1 °C
April 13	1941	20.0 °C
April 13	1939	20.0 °C

Latest Days ≥ 20 °C

Date	Year	Temperature
October 29	1944	20.0 °C
October 26	1944	21.1 °C
October 20	1940	21.7 °C
October 20	1939	21.1 °C
October 19	1940	23.9 °C
October 18	2022	20.8 °C
October 18	1974	20.0 °C
October 18	1940	23.9 °C
October 16	2022	21.7 °C
October 15	2022	20.1 °C
October 15	1961	20.0 °C
October 15	1945	21.7 °C
October 15	1941	20.0 °C
October 14	1991	21.3 °C
October 14	1945	27.2 °C
October 13	2004	21.5 °C
October 13	1979	20.2 °C
October 13	1961	20.0 °C
October 13	1946	20.6 °C
October 13	1945	25.6 °C