Portland Jetport Threshold Days by Year (USW00014764)
19 fixed thresholds counted per year at Portland Jetport (USW00014764): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Portland Jetport Thresholds
- Portland Jetport: days with a maximum temperature at or above 30 C (86 F) in 86 years, most in 1991 with 31.
- Portland Jetport: days with a maximum temperature at or below 0 C (32 F) in 86 years, most in 1943 with 64.
- Portland Jetport: nights with a minimum temperature at or below 0 C (32 F) in 86 years, most in 1944 with 180.
- Portland Jetport: nights with a minimum temperature at or below -10 C (14 F) in 86 years, most in 1945 with 70.
- 19 fixed thresholds have at least one qualifying day at Portland Jetport.
Days at or above 30 C (86 F)
86 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1941 | 19 | 16.3 |
| 1942 | 11 | 16.3 |
| 1943 | 12 | 16.3 |
| 1944 | 21 | 16.3 |
| 1945 | 14 | 16.3 |
| 1946 | 14 | 16.3 |
| 1947 | 14 | 16.3 |
| 1948 | 18 | 16.3 |
| 1949 | 24 | 16.3 |
| 1950 | 12 | 15.2 |
| 1951 | 11 | 15.2 |
| 1952 | 26 | 15.2 |
| 1953 | 18 | 15.2 |
| 1954 | 7 | 15.2 |
| 1955 | 26 | 15.2 |
| 1956 | 12 | 15.2 |
| 1957 | 12 | 15.2 |
| 1958 | 5 | 15.2 |
| 1959 | 23 | 15.2 |
| 1960 | 12 | 12 |
| 1961 | 11 | 12 |
| 1962 | 4 | 12 |
| 1963 | 17 | 12 |
| 1964 | 12 | 12 |
| 1965 | 17 | 12 |
| 1966 | 13 | 12 |
| 1967 | 4 | 12 |
| 1968 | 15 | 12 |
| 1969 | 15 | 12 |
| 1970 | 20 | 12.5 |
| 1971 | 12 | 12.5 |
| 1972 | 3 | 12.5 |
| 1973 | 18 | 12.5 |
| 1974 | 7 | 12.5 |
| 1975 | 12 | 12.5 |
| 1976 | 16 | 12.5 |
| 1977 | 14 | 12.5 |
| 1978 | 15 | 12.5 |
| 1979 | 8 | 12.5 |
| 1980 | 24 | 14.5 |
| 1981 | 8 | 14.5 |
| 1982 | 9 | 14.5 |
| 1983 | 22 | 14.5 |
| 1984 | 18 | 14.5 |
| 1985 | 8 | 14.5 |
| 1986 | 4 | 14.5 |
| 1987 | 12 | 14.5 |
| 1988 | 27 | 14.5 |
| 1989 | 13 | 14.5 |
| 1990 | 16 | 14.4 |
| 1991 | 31 | 14.4 |
| 1992 | 7 | 14.4 |
| 1993 | 19 | 14.4 |
| 1994 | 13 | 14.4 |
| 1995 | 15 | 14.4 |
| 1996 | 1 | 14.4 |
| 1997 | 18 | 14.4 |
| 1998 | 8 | 14.4 |
| 1999 | 16 | 14.4 |
| 2000 | 8 | 11.3 |
| 2001 | 18 | 11.3 |
| 2002 | 20 | 11.3 |
| 2003 | 11 | 11.3 |
| 2004 | 3 | 11.3 |
| 2005 | 18 | 11.3 |
| 2006 | 6 | 11.3 |
| 2007 | 14 | 11.3 |
| 2008 | 6 | 11.3 |
| 2009 | 9 | 11.3 |
| 2010 | 22 | 14.8 |
| 2011 | 11 | 14.8 |
| 2012 | 10 | 14.8 |
| 2013 | 15 | 14.8 |
| 2014 | 3 | 14.8 |
| 2015 | 15 | 14.8 |
| 2016 | 26 | 14.8 |
| 2017 | 13 | 14.8 |
| 2018 | 21 | 14.8 |
| 2019 | 12 | 14.8 |
| 2020 | 27 | 17.4 |
| 2021 | 22 | 17.4 |
| 2022 | 18 | 17.4 |
| 2023 | 9 | 17.4 |
| 2024 | 16 | 17.4 |
| 2025 | 14 | 17.4 |
| 2026 | 16 | 17.4 |
| Year | First date | Last date |
|---|---|---|
| 1941 | 1941-06-08 | 1941-09-23 |
| 1942 | 1942-06-12 | 1942-09-02 |
| 1943 | 1943-06-03 | 1943-08-14 |
| 1944 | 1944-05-31 | 1944-08-22 |
| 1945 | 1945-06-15 | 1945-09-08 |
| 1946 | 1946-03-29 | 1946-09-20 |
| 1947 | 1947-06-29 | 1947-10-07 |
| 1948 | 1948-06-25 | 1948-09-06 |
| 1949 | 1949-05-19 | 1949-08-28 |
| 1950 | 1950-06-08 | 1950-08-10 |
| 1951 | 1951-05-16 | 1951-09-12 |
| 1952 | 1952-06-09 | 1952-09-13 |
| 1953 | 1953-06-06 | 1953-09-02 |
| 1954 | 1954-06-21 | 1954-08-25 |
| 1955 | 1955-05-22 | 1955-09-18 |
| 1956 | 1956-06-13 | 1956-08-18 |
| 1957 | 1957-05-09 | 1957-09-13 |
| 1958 | 1958-06-30 | 1958-08-15 |
| 1959 | 1959-05-20 | 1959-09-24 |
| 1960 | 1960-06-28 | 1960-09-09 |
| 1961 | 1961-06-13 | 1961-09-12 |
| 1962 | 1962-05-31 | 1962-07-08 |
| 1963 | 1963-06-06 | 1963-10-07 |
| 1964 | 1964-05-23 | 1964-09-11 |
| 1965 | 1965-05-09 | 1965-09-22 |
| 1966 | 1966-06-04 | 1966-09-02 |
| 1967 | 1967-06-10 | 1967-08-18 |
| 1968 | 1968-06-06 | 1968-08-25 |
| 1969 | 1969-05-17 | 1969-09-01 |
| 1970 | 1970-06-01 | 1970-09-25 |
| 1971 | 1971-06-19 | 1971-09-05 |
| 1972 | 1972-07-02 | 1972-08-28 |
| 1973 | 1973-06-11 | 1973-09-03 |
| 1974 | 1974-06-09 | 1974-08-14 |
| 1975 | 1975-06-23 | 1975-08-14 |
| 1976 | 1976-06-08 | 1976-08-22 |
| 1977 | 1977-05-17 | 1977-09-02 |
| 1978 | 1978-06-28 | 1978-09-21 |
| 1979 | 1979-05-09 | 1979-08-01 |
| 1980 | 1980-05-22 | 1980-09-22 |
| 1981 | 1981-05-25 | 1981-08-02 |
| 1982 | 1982-07-08 | 1982-08-17 |
| 1983 | 1983-06-12 | 1983-09-19 |
| 1984 | 1984-06-08 | 1984-08-16 |
| 1985 | 1985-07-16 | 1985-09-20 |
| 1986 | 1986-06-28 | 1986-07-26 |
| 1987 | 1987-05-28 | 1987-08-18 |
| 1988 | 1988-05-28 | 1988-08-15 |
| 1989 | 1989-06-22 | 1989-09-11 |
| 1990 | 1990-06-02 | 1990-08-29 |
| 1991 | 1991-05-12 | 1991-09-17 |
| 1992 | 1992-05-21 | 1992-08-24 |
| 1993 | 1993-05-09 | 1993-09-15 |
| 1994 | 1994-06-18 | 1994-08-04 |
| 1995 | 1995-06-01 | 1995-09-01 |
| 1996 | 1996-07-18 | 1996-07-18 |
| 1997 | 1997-06-10 | 1997-08-17 |
| 1998 | 1998-03-31 | 1998-09-06 |
| 1999 | 1999-06-07 | 1999-09-03 |
| 2000 | 2000-06-17 | 2000-09-01 |
| 2001 | 2001-05-02 | 2001-09-08 |
| 2002 | 2002-06-27 | 2002-09-10 |
| 2003 | 2003-06-25 | 2003-08-27 |
| 2004 | 2004-06-09 | 2004-08-28 |
| 2005 | 2005-06-05 | 2005-09-12 |
| 2006 | 2006-07-09 | 2006-08-02 |
| 2007 | 2007-05-25 | 2007-09-26 |
| 2008 | 2008-06-08 | 2008-09-04 |
| 2009 | 2009-04-28 | 2009-08-23 |
| 2010 | 2010-05-25 | 2010-09-25 |
| 2011 | 2011-05-30 | 2011-07-23 |
| 2012 | 2012-06-20 | 2012-08-03 |
| 2013 | 2013-05-31 | 2013-09-11 |
| 2014 | 2014-07-23 | 2014-09-06 |
| 2015 | 2015-05-26 | 2015-09-09 |
| 2016 | 2016-05-28 | 2016-09-14 |
| 2017 | 2017-04-16 | 2017-09-24 |
| 2018 | 2018-05-02 | 2018-09-06 |
| 2019 | 2019-07-02 | 2019-09-23 |
| 2020 | 2020-05-28 | 2020-09-04 |
| 2021 | 2021-05-26 | 2021-08-27 |
| 2022 | 2022-06-25 | 2022-08-20 |
| 2023 | 2023-05-28 | 2023-09-07 |
| 2024 | 2024-06-19 | 2024-08-10 |
| 2025 | 2025-06-05 | 2025-10-06 |
| 2026 | 2026-05-19 | 2026-08-11 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 86 | 31 | 1991 | 16 |
| 35 C (95 F): Days | 36 | 8 | 1949 | 1 |
| 90 F (32.2 C): Days | 78 | 16 | 1955 | 7 |
| 100 F (37.8 C): Days | 3 | 2 | 1948 | 1 |
| 0 C (32 F): Ice days (max | 86 | 64 | 1943 | 36 |
| 0 C (32 F): Frost days (min | 86 | 180 | 1944 | 91 |
| -10 C (14 F): Days with min | 86 | 70 | 1945 | 37 |
| -20 C (-4 F): Days with min | 75 | 20 | 1948 | 2 |
| -30 C (-22 F): Days with min | 4 | 4 | 1971 | 4 |
| 20 C (68 F): Tropical nights (min | 62 | 16 | 2020 | 6 |
| 25 C (77 F): Days with min | 1 | 1 | 2020 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 86 | 56 | 2005 | 25 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 86 | 25 | 1983 | 10 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 73 | 7 | 2010 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 15 | 2 | 1991 | 1 |
| 200 mm (7.87 in): Days with 200 mm or more rain | 1 | 1 | 1996 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 86 | 16 | 1956 | 6 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 46 | 4 | 2013 | 1 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 3 | 1 | 1946 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1941.
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).