Portal 4 SW Threshold Days by Year (USC00026716)
15 fixed thresholds counted per year at Portal 4 SW (USC00026716): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Portal 4 SW Thresholds
- Portal 4 SW: days with 10 mm (0.39 in) or more of precipitation in 51 years, most in 1984 with 27.
- Portal 4 SW: days with 25 mm (0.98 in) or more of precipitation in 50 years, most in 1967 with 9.
- Portal 4 SW: days with a maximum temperature at or above 30 C (86 F) in 49 years, most in 1994 with 81.
- Portal 4 SW: days with a maximum temperature at or above 90 F (32.2 C) in 49 years, most in 1980 with 45.
- 15 fixed thresholds have at least one qualifying day at Portal 4 SW.
Days at or above 30 C (86 F)
49 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1966 | 56 | 57.5 |
| 1967 | 50 | 57.5 |
| 1968 | 50 | 57.5 |
| 1969 | 74 | 57.5 |
| 1970 | 58 | 55.9 |
| 1971 | 62 | 55.9 |
| 1972 | 45 | 55.9 |
| 1973 | 51 | 55.9 |
| 1974 | 59 | 55.9 |
| 1975 | 47 | 55.9 |
| 1976 | 48 | 55.9 |
| 1977 | 56 | 55.9 |
| 1978 | 62 | 55.9 |
| 1979 | 71 | 55.9 |
| 1980 | 73 | 55.6 |
| 1981 | 50 | 55.6 |
| 1982 | 67 | 55.6 |
| 1983 | 68 | 55.6 |
| 1984 | 55 | 55.6 |
| 1985 | 65 | 55.6 |
| 1986 | 41 | 55.6 |
| 1987 | 41 | 55.6 |
| 1988 | 44 | 55.6 |
| 1989 | 52 | 55.6 |
| 1990 | 39 | 49.1 |
| 1991 | 22 | 49.1 |
| 1992 | 37 | 49.1 |
| 1993 | 46 | 49.1 |
| 1994 | 81 | 49.1 |
| 1995 | 63 | 49.1 |
| 1996 | 69 | 49.1 |
| 1997 | 56 | 49.1 |
| 1998 | 49 | 49.1 |
| 1999 | 29 | 49.1 |
| 2000 | 69 | 64.1 |
| 2001 | 49 | 64.1 |
| 2002 | 69 | 64.1 |
| 2003 | 81 | 64.1 |
| 2004 | 49 | 64.1 |
| 2005 | 72 | 64.1 |
| 2007 | 60 | 64.1 |
| 2010 | 61 | 67 |
| 2011 | 75 | 67 |
| 2012 | 81 | 67 |
| 2013 | 62 | 67 |
| 2014 | 65 | 67 |
| 2015 | 58 | 67 |
| 2016 | 70 | 67 |
| 2017 | 64 | 67 |
| Year | First date | Last date |
|---|---|---|
| 1966 | 1966-05-23 | 1966-08-16 |
| 1967 | 1967-05-08 | 1967-08-30 |
| 1968 | 1968-05-19 | 1968-09-09 |
| 1969 | 1969-05-18 | 1969-09-23 |
| 1970 | 1970-05-14 | 1970-09-02 |
| 1971 | 1971-05-25 | 1971-09-16 |
| 1972 | 1972-04-05 | 1972-10-01 |
| 1973 | 1973-05-29 | 1973-10-03 |
| 1974 | 1974-05-12 | 1974-09-11 |
| 1975 | 1975-06-01 | 1975-09-01 |
| 1976 | 1976-05-14 | 1976-08-26 |
| 1977 | 1977-05-29 | 1977-10-01 |
| 1978 | 1978-05-13 | 1978-08-27 |
| 1979 | 1979-06-13 | 1979-10-11 |
| 1980 | 1980-05-20 | 1980-09-20 |
| 1981 | 1981-06-03 | 1981-09-28 |
| 1982 | 1982-05-21 | 1982-09-25 |
| 1983 | 1983-05-23 | 1983-09-12 |
| 1984 | 1984-05-09 | 1984-09-14 |
| 1985 | 1985-05-26 | 1985-09-01 |
| 1986 | 1986-05-20 | 1986-09-06 |
| 1987 | 1987-06-13 | 1987-08-19 |
| 1988 | 1988-05-13 | 1988-10-10 |
| 1989 | 1989-04-19 | 1989-09-21 |
| 1990 | 1990-05-22 | 1990-09-12 |
| 1991 | 1991-06-07 | 1991-08-22 |
| 1992 | 1992-06-17 | 1992-09-10 |
| 1993 | 1993-05-30 | 1993-09-22 |
| 1994 | 1994-05-28 | 1994-09-29 |
| 1995 | 1995-06-01 | 1995-09-08 |
| 1996 | 1996-04-24 | 1996-10-10 |
| 1997 | 1997-05-05 | 1997-09-09 |
| 1998 | 1998-05-31 | 1998-09-29 |
| 1999 | 1999-05-18 | 1999-09-08 |
| 2000 | 2000-04-26 | 2000-10-06 |
| 2001 | 2001-05-08 | 2001-09-06 |
| 2002 | 2002-05-14 | 2002-09-06 |
| 2003 | 2003-05-12 | 2003-10-01 |
| 2004 | 2004-05-18 | 2004-09-13 |
| 2005 | 2005-05-19 | 2005-09-28 |
| 2007 | 2007-06-02 | 2007-09-14 |
| 2010 | 2010-05-27 | 2010-10-02 |
| 2011 | 2011-05-25 | 2011-10-16 |
| 2012 | 2012-04-22 | 2012-09-21 |
| 2013 | 2013-05-23 | 2013-09-02 |
| 2014 | 2014-05-17 | 2014-09-03 |
| 2015 | 2015-05-30 | 2015-10-02 |
| 2016 | 2016-05-13 | 2016-09-21 |
| 2017 | 2017-05-05 | 2017-09-14 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 49 | 81 | 1994 | 64 |
| 35 C (95 F): Days | 39 | 19 | 2005 | 11 |
| 90 F (32.2 C): Days | 49 | 45 | 1980 | 31 |
| 100 F (37.8 C): Days | 4 | 4 | 1990 | 1 |
| 0 C (32 F): Ice days (max | 18 | 5 | 1987 | 1 |
| 0 C (32 F): Frost days (min | 47 | 175 | 1973 | 92 |
| -10 C (14 F): Days with min | 47 | 28 | 1966 | 3 |
| -20 C (-4 F): Days with min | 1 | 2 | 1978 | 2 |
| 20 C (68 F): Tropical nights (min | 6 | 1 | 1994 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 51 | 27 | 1984 | 15 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 50 | 9 | 1967 | 4 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 19 | 4 | 1967 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 2 | 1 | 1986 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 12 | 3 | 1975 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 3 | 1 | 1967 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1966.
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 (2025-12-31).