| Month | Average (°F) | Record (°F) | Average (inches) | ||
|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | |
| January | 65.4 | 41.7 | 91 | 24 | 4.4 |
| February | 65.5 | 43.1 | 89 | 21 | 4.0 |
| March | 67.3 | 45.1 | 90 | 28 | 3.3 |
| April | 69.7 | 46.1 | 104 | 29 | 1.2 |
| May | 72.4 | 49.0 | 103 | 32 | 0.5 |
| June | 75.9 | 51.4 | 109 | 35 | 0.1 |
| July | 78.7 | 54.4 | 111 | 36 | 0.1 |
| August | 80.1 | 55.0 | 111 | 40 | 0.0 |
| September | 80.5 | 53.5 | 113 | 38 | 0.1 |
| October | 78.1 | 50.5 | 109 | 30 | 0.9 |
| November | 71.6 | 45.3 | 98 | 25 | 1.6 |
| December | 65.2 | 41.2 | 92 | 17 | 3.3 |
| Entire year | 72.6 | 48.0 | 113 | 17 | 19.2 |
|
More San Luis Obispo Weather Records
1893–2024
|
||
|---|---|---|
| Highest daily low | 75 °F | September 22, 1939 |
| Lowest daily high | 40 °F | December 11, 1932 |
| Greatest daily range (Difference of high and low) |
57 °F | August 27, 1944 |
| Greatest difference in daily high over two conscutive days |
36 °F | Sep 7–8, 2020 |
| Most daily precipitation | 5.9 inches | January 25, 1969 |
| Most monthly precipitation | 24.6 inches | January 1969 |
| Most yearly precipitation | 49.9 inches | 1983 |
| Most yearly days with precipitation | 91 | 2005 |
| Earliest freeze | October 27 | 1929 |
| Earliest day ≥ 80 °F | January 1 | 1981 |
| Earliest day ≥ 90 °F | January 15 | 2021 |
| Earliest day ≥ 100 °F | April 7 | 1989 |
| Latest freeze | April 26 | 1975 |
| Latest day ≥ 80 °F | December 31 | 1980 |
| Latest day ≥ 90 °F | December 4 | 1958 |
| Latest day ≥ 100 °F | October 25 | 2017 |
| Most days in a year < 32 °F | 15 | 1971 |
| Most days in a year ≥ 80 °F | 124 | 2017 |
| Most days in a year ≥ 90 °F | 35 | 1996 |
| Most days in a year ≥ 100 °F | 7 | 2020 |
| Most days in a year ≥ 110 °F | 2 | 2010 |
|
San Luis Obispo Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 15 days | Jan 3–17, 1995 |
| Without precipitation | 215 days | Apr 13 – Nov 13, 1965 |
| High temperature ≥ 80 °F | 26 days | Aug 23 – Sep 17, 1998 |
| High temperature ≥ 90 °F | 9 days | Oct 21–29, 1965 |
| High temperature ≥ 100 °F | 5 days | Sep 24–28, 1978 |