Alpine Threshold Days by Year (USC00020159)
14 fixed thresholds counted per year at Alpine (USC00020159): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Alpine Thresholds
- Alpine: days with 10 mm (0.39 in) or more of precipitation in 87 years, most in 1905 with 36.
- Alpine: days with 25 mm (0.98 in) or more of precipitation in 78 years, most in 1905 with 8.
- Alpine: days with 10 cm (3.9 in) or more of snowfall in 78 years, most in 1905 with 17.
- Alpine: nights with a minimum temperature at or below 0 C (32 F) in 50 years, most in 1956 with 255.
- 14 fixed thresholds have at least one qualifying day at Alpine.
Days at or above 30 C (86 F)
44 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1915 | 3 | 3 |
| 1942 | 9 | 9 |
| 1952 | 4 | 5.4 |
| 1956 | 7 | 5.4 |
| 1957 | 6 | 5.4 |
| 1958 | 9 | 5.4 |
| 1959 | 1 | 5.4 |
| 1960 | 12 | 7.3 |
| 1961 | 10 | 7.3 |
| 1962 | 4 | 7.3 |
| 1963 | 3 | 7.3 |
| 1970 | 6 | 3.5 |
| 1971 | 6 | 3.5 |
| 1975 | 1 | 3.5 |
| 1976 | 1 | 3.5 |
| 1985 | 5 | 4.3 |
| 1987 | 1 | 4.3 |
| 1989 | 7 | 4.3 |
| 1990 | 5 | 4.2 |
| 1995 | 5 | 4.2 |
| 1996 | 2 | 4.2 |
| 1997 | 3 | 4.2 |
| 1998 | 6 | 4.2 |
| 1999 | 4 | 4.2 |
| 2000 | 5 | 5.9 |
| 2002 | 15 | 5.9 |
| 2003 | 11 | 5.9 |
| 2004 | 1 | 5.9 |
| 2005 | 4 | 5.9 |
| 2006 | 1 | 5.9 |
| 2007 | 4 | 5.9 |
| 2010 | 2 | 5 |
| 2011 | 6 | 5 |
| 2012 | 6 | 5 |
| 2013 | 8 | 5 |
| 2014 | 2 | 5 |
| 2016 | 4 | 5 |
| 2017 | 7 | 5 |
| 2021 | 13 | 9.3 |
| 2022 | 2 | 9.3 |
| 2023 | 18 | 9.3 |
| 2024 | 3 | 9.3 |
| 2025 | 15 | 9.3 |
| 2026 | 5 | 9.3 |
| Year | First date | Last date |
|---|---|---|
| 1915 | 1915-06-21 | 1915-06-29 |
| 1942 | 1942-06-19 | 1942-07-25 |
| 1952 | 1952-07-01 | 1952-08-03 |
| 1956 | 1956-06-12 | 1956-09-18 |
| 1957 | 1957-06-26 | 1957-07-10 |
| 1958 | 1958-06-19 | 1958-08-18 |
| 1959 | 1959-07-12 | 1959-07-12 |
| 1960 | 1960-06-13 | 1960-07-28 |
| 1961 | 1961-06-14 | 1961-07-25 |
| 1962 | 1962-06-20 | 1962-08-15 |
| 1963 | 1963-07-01 | 1963-07-15 |
| 1970 | 1970-06-24 | 1970-07-14 |
| 1971 | 1971-07-11 | 1971-07-16 |
| 1975 | 1975-07-01 | 1975-07-01 |
| 1976 | 1976-06-30 | 1976-06-30 |
| 1985 | 1985-07-05 | 1985-08-27 |
| 1987 | 1987-06-21 | 1987-06-21 |
| 1989 | 1989-06-18 | 1989-07-06 |
| 1990 | 1990-06-21 | 1990-07-02 |
| 1995 | 1995-07-25 | 1995-08-10 |
| 1996 | 1996-06-20 | 1996-07-23 |
| 1997 | 1997-07-02 | 1997-07-16 |
| 1998 | 1998-06-27 | 1998-07-15 |
| 1999 | 1999-06-25 | 1999-07-01 |
| 2000 | 2000-05-28 | 2000-07-28 |
| 2002 | 2002-05-30 | 2002-07-21 |
| 2003 | 2003-07-04 | 2003-07-23 |
| 2004 | 2004-06-14 | 2004-06-14 |
| 2005 | 2005-07-11 | 2005-07-15 |
| 2006 | 2006-07-14 | 2006-07-14 |
| 2007 | 2007-07-01 | 2007-07-09 |
| 2010 | 2010-06-05 | 2010-06-06 |
| 2011 | 2011-06-23 | 2011-07-05 |
| 2012 | 2012-06-20 | 2012-07-02 |
| 2013 | 2013-06-09 | 2013-07-02 |
| 2014 | 2014-06-10 | 2014-06-30 |
| 2016 | 2016-06-18 | 2016-07-15 |
| 2017 | 2017-06-17 | 2017-06-26 |
| 2021 | 2021-06-11 | 2021-07-12 |
| 2022 | 2022-07-17 | 2022-09-20 |
| 2023 | 2023-07-04 | 2023-08-24 |
| 2024 | 2024-06-07 | 2024-06-14 |
| 2025 | 2025-06-14 | 2025-08-08 |
| 2026 | 2026-07-11 | 2026-08-05 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 44 | 18 | 2023 | 5 |
| 90 F (32.2 C): Days | 10 | 4 | 2021 | 1 |
| 0 C (32 F): Ice days (max | 49 | 16 | 1997 | 1 |
| 0 C (32 F): Frost days (min | 50 | 255 | 1956 | 125 |
| -10 C (14 F): Days with min | 50 | 118 | 1956 | 11 |
| -20 C (-4 F): Days with min | 45 | 15 | 1915 | 1 |
| -30 C (-22 F): Days with min | 4 | 3 | 1971 | 1 |
| 20 C (68 F): Tropical nights (min | 1 | 1 | 2011 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 87 | 36 | 1905 | 16 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 78 | 8 | 1905 | 2 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 17 | 2 | 1999 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 78 | 17 | 1905 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 39 | 3 | 1915 | 1 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 2 | 0 | n/a | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1915.
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).