Earliest and Latest Days of 90° F in Half Moon Bay

This is a list of the earliest and latest days in the year with a high temperature of at least 90 °F in Half Moon Bay, California history. It is based on NOAA data from the years 1939–2024.

Also see:

Earliest 90 degree day in Half Moon Bay?

The earliest in the year that Half Moon Bay, California had a high temperature of at least 90 °F is September 4 which happened in 1961.

Latest 90 degree day in Half Moon Bay?

The latest in the year that Half Moon Bay, California had a high temperature of at least 90 °F is October 27 which happened in 2003.

Earliest Days ≥ 90 °F

Date	Year	Temperature
September 4	1961	90 °F
September 8	1944	90 °F
September 11	1979	90 °F
September 16	1958	90 °F
September 20	1939	90 °F
September 23	1978	91 °F
September 23	1956	90 °F
September 24	1954	91 °F
September 25	2019	92 °F
September 26	1970	90 °F
September 28	1997	90 °F
September 28	1958	91 °F
September 30	2001	92 °F
October 5	2023	90 °F
October 8	1994	90 °F
October 15	2020	90 °F
October 15	1997	90 °F
October 16	2020	92 °F
October 16	1961	90 °F
October 20	1991	91 °F

Latest Days ≥ 90 °F

Date	Year	Temperature
October 27	2003	94 °F
October 26	2003	94 °F
October 25	2019	90 °F
October 25	2017	92 °F
October 25	2003	90 °F
October 24	2017	92 °F
October 24	1965	91 °F
October 22	1965	91 °F
October 20	1991	91 °F
October 16	2020	92 °F
October 16	1961	90 °F
October 15	2020	90 °F
October 15	1997	90 °F
October 8	1994	90 °F
October 5	2023	90 °F
September 30	2001	92 °F
September 28	1997	90 °F
September 28	1958	91 °F
September 26	1970	90 °F
September 25	2019	92 °F