San Luis Obispo August Weather

Averages and records for weather in San Luis Obispo, California in the month of August.
Typical San Luis Obispo August Weather
1991–2020
Average daily high 80.1 °F
Average daily low 55.0 °F
Average monthly precipitation 0.0 inches
Daily chance of precipitation 1.3%
San Luis Obispo August Weather Records
1893–2024
Highest temperature 111 °F August 29, 2009
Lowest temperature 40 °F August 10, 1970
Highest daily low 70 °F August 19, 2020
Lowest daily high 55 °F August 31, 1942
Hottest average high temperature 86.3 °F 1998
Coldest average high temperature 74.1 °F 1954
Most daily precipitation 1.5 inches August 30, 1916
Most monthly precipitation 1.5 inches 1916
Note: Daily averages are a moving average which includes 14 days before and after
Day Average (°F) Record (°F)
High Low High Low
August 1 79.3 54.9 94 44
August 2 79.4 54.9 101 42
August 3 79.5 55.0 99 42
August 4 79.5 55.0 95 47
August 5 79.5 55.0 104 48
August 6 79.6 54.9 101 45
August 7 79.6 54.9 101 44
August 8 79.6 55.0 95 42
August 9 79.6 55.0 99 41
August 10 79.6 55.0 100 40
August 11 79.7 55.0 96 46
August 12 79.7 55.0 97 47
August 13 79.8 55.0 98 48
August 14 79.9 54.9 101 47
August 15 80.0 54.9 101 45
August 16 80.1 54.9 92 47
August 17 80.1 54.9 94 47
August 18 80.2 54.9 100 47
August 19 80.3 54.9 97 47
August 20 80.3 54.9 95 47
August 21 80.4 54.9 93 46
August 22 80.5 54.9 92 41
August 23 80.6 54.9 100 46
August 24 80.7 54.8 96 45
August 25 80.7 54.8 100 47
August 26 80.7 54.8 96 45
August 27 80.6 54.8 107 46
August 28 80.6 54.7 106 45
August 29 80.5 54.7 111 46
August 30 80.3 54.6 102 43
August 31 80.2 54.6 102 47
Weather Station Details
Years Station Coordinates
1999–2024 San Luis Obispo Airport location
1893–1998 San Luis Obispo Poly location