San Luis Obispo Poly Threshold Days by Year (USC00047851)
13 fixed thresholds counted per year at San Luis Obispo Poly (USC00047851): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for San Luis Obispo Poly Thresholds
- San Luis Obispo Poly: days with a maximum temperature at or above 30 C (86 F) in 92 years, most in 1996 with 59.
- San Luis Obispo Poly: days with a maximum temperature at or above 90 F (32.2 C) in 92 years, most in 2003 with 37.
- San Luis Obispo Poly: days with a maximum temperature at or above 35 C (95 F) in 90 years, most in 2020 with 18.
- San Luis Obispo Poly: days with 10 mm (0.39 in) or more of precipitation in 89 years, most in 1983 with 37.
- 13 fixed thresholds have at least one qualifying day at San Luis Obispo Poly.
Days at or above 30 C (86 F)
92 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1928 | 17 | 24.5 |
| 1929 | 32 | 24.5 |
| 1930 | 31 | 23.4 |
| 1931 | 47 | 23.4 |
| 1932 | 13 | 23.4 |
| 1933 | 18 | 23.4 |
| 1934 | 28 | 23.4 |
| 1935 | 13 | 23.4 |
| 1936 | 28 | 23.4 |
| 1937 | 19 | 23.4 |
| 1938 | 15 | 23.4 |
| 1939 | 22 | 23.4 |
| 1940 | 14 | 16.6 |
| 1941 | 17 | 16.6 |
| 1942 | 11 | 16.6 |
| 1943 | 14 | 16.6 |
| 1944 | 11 | 16.6 |
| 1945 | 19 | 16.6 |
| 1946 | 17 | 16.6 |
| 1947 | 24 | 16.6 |
| 1948 | 12 | 16.6 |
| 1949 | 27 | 16.6 |
| 1950 | 22 | 21 |
| 1951 | 15 | 21 |
| 1952 | 14 | 21 |
| 1953 | 21 | 21 |
| 1954 | 15 | 21 |
| 1955 | 17 | 21 |
| 1956 | 21 | 21 |
| 1957 | 17 | 21 |
| 1958 | 32 | 21 |
| 1959 | 36 | 21 |
| 1960 | 21 | 22.7 |
| 1961 | 29 | 22.7 |
| 1962 | 14 | 22.7 |
| 1963 | 18 | 22.7 |
| 1964 | 20 | 22.7 |
| 1965 | 23 | 22.7 |
| 1966 | 28 | 22.7 |
| 1967 | 34 | 22.7 |
| 1968 | 20 | 22.7 |
| 1969 | 20 | 22.7 |
| 1970 | 28 | 23.1 |
| 1971 | 31 | 23.1 |
| 1972 | 16 | 23.1 |
| 1973 | 27 | 23.1 |
| 1974 | 15 | 23.1 |
| 1975 | 12 | 23.1 |
| 1976 | 28 | 23.1 |
| 1977 | 20 | 23.1 |
| 1978 | 27 | 23.1 |
| 1979 | 27 | 23.1 |
| 1980 | 22 | 27.1 |
| 1981 | 34 | 27.1 |
| 1982 | 16 | 27.1 |
| 1983 | 35 | 27.1 |
| 1984 | 42 | 27.1 |
| 1987 | 18 | 27.1 |
| 1989 | 23 | 27.1 |
| 1990 | 24 | 36.5 |
| 1991 | 22 | 36.5 |
| 1992 | 40 | 36.5 |
| 1993 | 40 | 36.5 |
| 1994 | 21 | 36.5 |
| 1995 | 37 | 36.5 |
| 1996 | 59 | 36.5 |
| 1997 | 58 | 36.5 |
| 1998 | 36 | 36.5 |
| 1999 | 28 | 36.5 |
| 2000 | 32 | 39 |
| 2001 | 40 | 39 |
| 2002 | 40 | 39 |
| 2003 | 58 | 39 |
| 2004 | 47 | 39 |
| 2009 | 17 | 39 |
| 2010 | 19 | 33.5 |
| 2011 | 12 | 33.5 |
| 2012 | 30 | 33.5 |
| 2013 | 33 | 33.5 |
| 2014 | 40 | 33.5 |
| 2015 | 45 | 33.5 |
| 2016 | 36 | 33.5 |
| 2017 | 51 | 33.5 |
| 2018 | 34 | 33.5 |
| 2019 | 35 | 33.5 |
| 2020 | 55 | 29.6 |
| 2021 | 25 | 29.6 |
| 2022 | 33 | 29.6 |
| 2023 | 21 | 29.6 |
| 2024 | 24 | 29.6 |
| 2025 | 22 | 29.6 |
| 2026 | 27 | 29.6 |
| Year | First date | Last date |
|---|---|---|
| 1928 | 1928-05-05 | 1928-10-07 |
| 1929 | 1929-05-01 | 1929-11-28 |
| 1930 | 1930-02-14 | 1930-11-11 |
| 1931 | 1931-04-06 | 1931-10-30 |
| 1932 | 1932-02-27 | 1932-11-18 |
| 1933 | 1933-05-27 | 1933-11-24 |
| 1934 | 1934-04-26 | 1934-10-25 |
| 1935 | 1935-06-02 | 1935-10-27 |
| 1936 | 1936-05-08 | 1936-11-19 |
| 1937 | 1937-05-12 | 1937-10-28 |
| 1938 | 1938-05-31 | 1938-12-08 |
| 1939 | 1939-08-28 | 1939-11-23 |
| 1940 | 1940-04-11 | 1940-10-20 |
| 1941 | 1941-05-07 | 1941-11-07 |
| 1942 | 1942-05-20 | 1942-10-22 |
| 1943 | 1943-06-16 | 1943-11-11 |
| 1944 | 1944-05-06 | 1944-10-25 |
| 1945 | 1945-04-30 | 1945-11-04 |
| 1946 | 1946-04-22 | 1946-10-25 |
| 1947 | 1947-04-11 | 1947-10-19 |
| 1948 | 1948-08-29 | 1948-10-18 |
| 1949 | 1949-04-23 | 1949-11-16 |
| 1950 | 1950-04-18 | 1950-11-04 |
| 1951 | 1951-03-15 | 1951-10-14 |
| 1952 | 1952-04-18 | 1952-11-05 |
| 1953 | 1953-03-08 | 1953-10-27 |
| 1954 | 1954-02-08 | 1954-10-13 |
| 1955 | 1955-08-03 | 1955-11-11 |
| 1956 | 1956-05-16 | 1956-11-25 |
| 1957 | 1957-05-27 | 1957-09-08 |
| 1958 | 1958-04-20 | 1958-12-04 |
| 1959 | 1959-04-02 | 1959-12-03 |
| 1960 | 1960-03-19 | 1960-09-26 |
| 1961 | 1961-04-03 | 1961-11-06 |
| 1962 | 1962-04-07 | 1962-11-01 |
| 1963 | 1963-06-26 | 1963-09-29 |
| 1964 | 1964-04-14 | 1964-10-22 |
| 1965 | 1965-08-09 | 1965-10-29 |
| 1966 | 1966-04-01 | 1966-11-03 |
| 1967 | 1967-05-08 | 1967-11-02 |
| 1968 | 1968-04-11 | 1968-10-25 |
| 1969 | 1969-05-31 | 1969-11-02 |
| 1970 | 1970-05-03 | 1970-10-10 |
| 1971 | 1971-02-13 | 1971-10-10 |
| 1972 | 1972-03-06 | 1972-10-07 |
| 1973 | 1973-05-11 | 1973-10-31 |
| 1974 | 1974-05-26 | 1974-10-18 |
| 1975 | 1975-05-13 | 1975-12-09 |
| 1976 | 1976-01-17 | 1976-11-19 |
| 1977 | 1977-02-16 | 1977-10-26 |
| 1978 | 1978-05-13 | 1978-11-09 |
| 1979 | 1979-05-12 | 1979-09-22 |
| 1980 | 1980-06-27 | 1980-11-05 |
| 1981 | 1981-04-06 | 1981-11-03 |
| 1982 | 1982-07-10 | 1982-10-12 |
| 1983 | 1983-05-19 | 1983-10-28 |
| 1984 | 1984-04-14 | 1984-09-30 |
| 1987 | 1987-04-22 | 1987-10-27 |
| 1989 | 1989-04-06 | 1989-11-22 |
| 1990 | 1990-04-12 | 1990-11-13 |
| 1991 | 1991-02-15 | 1991-11-12 |
| 1992 | 1992-04-20 | 1992-11-15 |
| 1993 | 1993-04-30 | 1993-11-04 |
| 1994 | 1994-03-03 | 1994-11-01 |
| 1995 | 1995-02-21 | 1995-11-14 |
| 1996 | 1996-04-07 | 1996-10-16 |
| 1997 | 1997-03-11 | 1997-11-05 |
| 1998 | 1998-04-22 | 1998-10-21 |
| 1999 | 1999-04-15 | 1999-11-02 |
| 2000 | 2000-04-27 | 2000-10-17 |
| 2001 | 2001-03-30 | 2001-11-09 |
| 2002 | 2002-02-23 | 2002-11-23 |
| 2003 | 2003-03-31 | 2003-10-29 |
| 2004 | 2004-03-09 | 2004-10-14 |
| 2009 | 2009-04-19 | 2009-10-17 |
| 2010 | 2010-05-30 | 2010-11-04 |
| 2011 | 2011-03-31 | 2011-10-30 |
| 2012 | 2012-04-19 | 2012-11-06 |
| 2013 | 2013-04-20 | 2013-12-18 |
| 2014 | 2014-01-15 | 2014-11-26 |
| 2015 | 2015-03-13 | 2015-10-31 |
| 2016 | 2016-02-09 | 2016-11-10 |
| 2017 | 2017-03-13 | 2017-11-23 |
| 2018 | 2018-02-03 | 2018-11-03 |
| 2019 | 2019-06-10 | 2019-11-17 |
| 2020 | 2020-04-24 | 2020-11-16 |
| 2021 | 2021-04-01 | 2021-12-01 |
| 2022 | 2022-03-22 | 2022-10-20 |
| 2023 | 2023-07-13 | 2023-11-03 |
| 2024 | 2024-06-04 | 2024-10-24 |
| 2025 | 2025-02-27 | 2025-11-10 |
| 2026 | 2026-03-13 | 2026-09-14 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 92 | 59 | 1996 | 27 |
| 35 C (95 F): Days | 90 | 18 | 2020 | 4 |
| 40 C (104 F): Days | 33 | 4 | 2010 | 1 |
| 45 C (113 F): Days | 1 | 1 | 2020 | 1 |
| 90 F (32.2 C): Days | 92 | 37 | 2003 | 11 |
| 100 F (37.8 C): Days | 59 | 8 | 2020 | 4 |
| 110 F (43.3 C): Days | 5 | 1 | 1955 | 1 |
| 0 C (32 F): Frost days (min | 71 | 18 | 1971 | 2 |
| 20 C (68 F): Tropical nights (min | 31 | 8 | 2020 | 4 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 89 | 37 | 1983 | 11 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 88 | 17 | 1973 | 4 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 68 | 7 | 1969 | 3 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 13 | 4 | 1969 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1928.
Download the Data
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2026-10-17).