Average August Temperature in San Luis Obispo by Year

This page contains a list of the average monthly high and low temperatures in San Luis Obispo, California for the month of August each year between 1928 and 2023. It is based on NOAA data.

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What Was the Hottest August Ever in San Luis Obispo?

1998 was the warmest August in the history of San Luis Obispo, California. The average daily high temperature was 86.3 °F, and the average low was 55.8 °F.

What Was the Coldest August Ever in San Luis Obispo?

1954 was the coolest August in the history of San Luis Obispo, California. The average daily high temperature was 74.1 °F, and the average low was 51.7 °F.

* click column headers to sort

Year	Rank	High (°F)	Low (°F)
2023	2	82.9	59.0
2022	35	79.7	53.6
2021	16	79.6	56.7
2020	6	83.0	57.2
2019	21	80.3	54.9
2018	15	80.7	55.9
2017	10	79.9	57.6
2016	18	78.6	57.2
2015	3	81.9	59.9
2014	12	79.7	57.6
2013	37	78.2	54.8
2012	30	79.8	54.1
2011	65	75.9	54.3
2010	71	76.1	53.5
2009	5	83.3	56.9
2008	11	81.5	56.0
2007	32	79.9	53.8
2006	41	76.4	55.5
2005	40	77.3	54.7
2004	34	78.3	55.1
2003	29	79.7	54.3
2002	67	76.7	53.2
2001	66	77.0	53.1
2000	33	79.4	54.1
1999	74	76.8	52.2
1998	1	86.3	55.8
1997	4	84.2	56.9
1996	9	84.9	52.9
1995	13	83.6	53.5
1994	27	80.5	53.6
1993	24	80.8	53.9
1992	20	84.4	51.0
1991	47	77.7	53.9
1990	59	79.4	51.1
1989	84	77.3	50.4
1988	52	78.3	52.7
1987	77	76.5	51.9
1986	39	79.6	52.6
1985	54	79.2	51.7
1983	7	81.8	56.6
1982	31	80.5	53.2
1981	36	80.4	52.6
1980	50	78.1	53.2
1979	44	78.6	53.2
1977	23	78.9	55.8
1976	64	76.2	54.0
1975	57	77.6	53.0
1974	62	77.5	52.8
1973	72	77.9	51.6
1972	46	78.8	53.0
1971	19	82.5	53.2
1970	90	77.7	49.2
1969	38	82.5	50.4
1968	68	78.0	51.8
1967	22	80.2	54.7
1966	45	79.4	52.5
1965	28	80.8	53.3
1964	75	77.2	51.6
1963	53	79.6	51.3
1962	43	80.3	51.6
1961	26	79.2	55.1
1960	87	76.1	51.1
1959	25	79.4	55.1
1958	14	79.9	57.0
1957	69	78.1	51.7
1956	92	75.2	50.7
1955	83	77.0	50.9
1954	94	74.1	51.7
1953	85	76.1	51.4
1952	89	76.0	51.0
1951	78	75.2	53.2
1950	79	76.6	51.8
1949	73	76.8	52.6
1948	82	75.7	52.2
1947	49	78.3	53.2
1946	86	75.4	52.0
1945	58	77.5	53.2
1944	80	78.1	50.0
1943	88	76.2	51.0
1942	91	75.1	51.3
1941	51	77.2	53.8
1940	81	75.6	52.4
1939	61	76.8	53.6
1938	48	77.3	54.3
1937	63	77.4	52.9
1936	55	77.3	53.6
1935	56	77.8	52.9
1934	60	77.6	52.9
1933	76	75.8	52.9
1932	93	75.1	50.7
1931	8	83.8	54.1
1930	42	81.3	50.6
1929	17	83.7	52.5
1928	70	77.6	52.1

Weather Station Details

Years	Station	Coordinates
1999–2024	San Luis Obispo Airport	location
1893–1998	San Luis Obispo Poly	location