Terra Alta #1 Threshold Days by Year (USC00468777)
14 fixed thresholds counted per year at Terra Alta #1 (USC00468777): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Terra Alta #1 Thresholds
- Terra Alta #1: days with 10 mm (0.39 in) or more of precipitation in 52 years, most in 2018 with 68.
- Terra Alta #1: days with 25 mm (0.98 in) or more of precipitation in 52 years, most in 2003 with 20.
- Terra Alta #1: nights with a minimum temperature at or below 0 C (32 F) in 50 years, most in 1966 with 171.
- Terra Alta #1: nights with a minimum temperature at or below -10 C (14 F) in 50 years, most in 1966 with 60.
- 14 fixed thresholds have at least one qualifying day at Terra Alta #1.
Days at or above 30 C (86 F)
25 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1949 | 9 | 9 |
| 1966 | 14 | 5.8 |
| 1967 | 4 | 5.8 |
| 1968 | 2 | 5.8 |
| 1969 | 3 | 5.8 |
| 1974 | 3 | 2.5 |
| 1975 | 3 | 2.5 |
| 1976 | 2 | 2.5 |
| 1977 | 4 | 2.5 |
| 1978 | 1 | 2.5 |
| 1979 | 2 | 2.5 |
| 1980 | 5 | 3 |
| 1981 | 1 | 3 |
| 1991 | 3 | 4.5 |
| 1993 | 7 | 4.5 |
| 1994 | 4 | 4.5 |
| 1995 | 3 | 4.5 |
| 1998 | 1 | 4.5 |
| 1999 | 9 | 4.5 |
| 2002 | 3 | 3 |
| 2010 | 14 | 8 |
| 2012 | 12 | 8 |
| 2013 | 3 | 8 |
| 2016 | 6 | 8 |
| 2018 | 5 | 8 |
| Year | First date | Last date |
|---|---|---|
| 1949 | 1949-06-24 | 1949-08-14 |
| 1966 | 1966-06-25 | 1966-07-28 |
| 1967 | 1967-06-14 | 1967-06-18 |
| 1968 | 1968-06-08 | 1968-07-19 |
| 1969 | 1969-06-27 | 1969-07-01 |
| 1974 | 1974-05-15 | 1974-05-17 |
| 1975 | 1975-08-01 | 1975-08-03 |
| 1976 | 1976-04-18 | 1976-08-24 |
| 1977 | 1977-07-16 | 1977-08-28 |
| 1978 | 1978-07-19 | 1978-07-19 |
| 1979 | 1979-05-09 | 1979-08-01 |
| 1980 | 1980-07-15 | 1980-07-31 |
| 1981 | 1981-07-19 | 1981-07-19 |
| 1991 | 1991-07-18 | 1991-08-02 |
| 1993 | 1993-07-28 | 1993-09-02 |
| 1994 | 1994-06-15 | 1994-07-06 |
| 1995 | 1995-07-15 | 1995-08-03 |
| 1998 | 1998-09-14 | 1998-09-14 |
| 1999 | 1999-06-09 | 1999-09-03 |
| 2002 | 2002-08-03 | 2002-09-10 |
| 2010 | 2010-07-05 | 2010-09-02 |
| 2012 | 2012-05-28 | 2012-07-27 |
| 2013 | 2013-07-17 | 2013-07-19 |
| 2016 | 2016-07-25 | 2016-08-29 |
| 2018 | 2018-07-02 | 2018-09-06 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 25 | 14 | 1966 | 5 |
| 90 F (32.2 C): Days | 4 | 3 | 1966 | 3 |
| 0 C (32 F): Ice days (max | 36 | 64 | 1969 | 39 |
| 0 C (32 F): Frost days (min | 50 | 171 | 1966 | 153 |
| -10 C (14 F): Days with min | 50 | 60 | 1966 | 37 |
| -20 C (-4 F): Days with min | 34 | 16 | 2015 | 3 |
| -30 C (-22 F): Days with min | 5 | 1 | 1966 | 1 |
| 20 C (68 F): Tropical nights (min | 35 | 8 | 1999 | 2 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 52 | 68 | 2018 | 68 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 52 | 20 | 2003 | 19 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 31 | 4 | 2003 | 3 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 45 | 31 | 2010 | 15 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 34 | 9 | 2010 | 2 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 6 | 1 | 1974 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.
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).