Den Helder-1 Threshold Days by Year (NLM00006235)
11 fixed thresholds counted per year at Den Helder-1 (NLM00006235): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Den Helder-1 Thresholds
- Den Helder-1: days with 10 mm (0.39 in) or more of precipitation in 176 years, most in 2023 with 43.
- Den Helder-1: days with 25 mm (0.98 in) or more of precipitation in 133 years, most in 2024 with 7.
- Den Helder-1: nights with a minimum temperature at or below 0 C (32 F) in 119 years, most in 1929 with 94.
- Den Helder-1: days with a maximum temperature at or below 0 C (32 F) in 105 years, most in 1963 with 53.
- 11 fixed thresholds have at least one qualifying day at Den Helder-1.
Days at or above 30 C (86 F)
42 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1911 | 2 | 1.7 |
| 1912 | 2 | 1.7 |
| 1915 | 1 | 1.7 |
| 1923 | 5 | 3 |
| 1925 | 1 | 3 |
| 1932 | 2 | 2 |
| 1947 | 1 | 1 |
| 1949 | 1 | 1 |
| 1959 | 1 | 1 |
| 1964 | 1 | 1 |
| 1968 | 1 | 1 |
| 1969 | 1 | 1 |
| 1973 | 1 | 2 |
| 1975 | 4 | 2 |
| 1976 | 1 | 2 |
| 1990 | 2 | 1.3 |
| 1991 | 1 | 1.3 |
| 1994 | 2 | 1.3 |
| 1996 | 1 | 1.3 |
| 1997 | 1 | 1.3 |
| 1999 | 1 | 1.3 |
| 2000 | 2 | 1.4 |
| 2001 | 2 | 1.4 |
| 2003 | 1 | 1.4 |
| 2004 | 2 | 1.4 |
| 2005 | 1 | 1.4 |
| 2006 | 1 | 1.4 |
| 2009 | 1 | 1.4 |
| 2010 | 1 | 2 |
| 2011 | 2 | 2 |
| 2012 | 1 | 2 |
| 2013 | 1 | 2 |
| 2014 | 1 | 2 |
| 2015 | 1 | 2 |
| 2016 | 3 | 2 |
| 2017 | 2 | 2 |
| 2018 | 2 | 2 |
| 2019 | 6 | 2 |
| 2020 | 3 | 3.5 |
| 2022 | 3 | 3.5 |
| 2025 | 1 | 3.5 |
| 2026 | 7 | 3.5 |
| Year | First date | Last date |
|---|---|---|
| 1911 | 1911-07-28 | 1911-08-10 |
| 1912 | 1912-07-12 | 1912-07-13 |
| 1915 | 1915-06-08 | 1915-06-08 |
| 1923 | 1923-07-10 | 1923-07-14 |
| 1925 | 1925-07-22 | 1925-07-22 |
| 1932 | 1932-08-19 | 1932-08-20 |
| 1947 | 1947-06-27 | 1947-06-27 |
| 1949 | 1949-09-05 | 1949-09-05 |
| 1959 | 1959-07-09 | 1959-07-09 |
| 1964 | 1964-06-13 | 1964-06-13 |
| 1968 | 1968-07-02 | 1968-07-02 |
| 1969 | 1969-07-29 | 1969-07-29 |
| 1973 | 1973-07-02 | 1973-07-02 |
| 1975 | 1975-08-06 | 1975-08-09 |
| 1976 | 1976-06-26 | 1976-06-26 |
| 1990 | 1990-08-03 | 1990-08-04 |
| 1991 | 1991-07-11 | 1991-07-11 |
| 1994 | 1994-07-12 | 1994-08-04 |
| 1996 | 1996-06-07 | 1996-06-07 |
| 1997 | 1997-08-12 | 1997-08-12 |
| 1999 | 1999-08-02 | 1999-08-02 |
| 2000 | 2000-06-19 | 2000-08-13 |
| 2001 | 2001-07-05 | 2001-08-15 |
| 2003 | 2003-07-16 | 2003-07-16 |
| 2004 | 2004-08-08 | 2004-08-09 |
| 2005 | 2005-06-20 | 2005-06-20 |
| 2006 | 2006-06-11 | 2006-06-11 |
| 2009 | 2009-08-20 | 2009-08-20 |
| 2010 | 2010-07-09 | 2010-07-09 |
| 2011 | 2011-06-27 | 2011-06-28 |
| 2012 | 2012-08-18 | 2012-08-18 |
| 2013 | 2013-09-05 | 2013-09-05 |
| 2014 | 2014-07-19 | 2014-07-19 |
| 2015 | 2015-07-01 | 2015-07-01 |
| 2016 | 2016-07-20 | 2016-08-25 |
| 2017 | 2017-05-27 | 2017-07-19 |
| 2018 | 2018-07-27 | 2018-08-07 |
| 2019 | 2019-06-24 | 2019-08-27 |
| 2020 | 2020-08-07 | 2020-08-11 |
| 2022 | 2022-07-19 | 2022-08-25 |
| 2025 | 2025-07-01 | 2025-07-01 |
| 2026 | 2026-06-19 | 2026-08-14 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 42 | 6 | 2019 | 7 |
| 35 C (95 F): Days | 2 | 1 | 2022 | 1 |
| 90 F (32.2 C): Days | 13 | 2 | 1990 | 1 |
| 0 C (32 F): Ice days (max | 105 | 53 | 1963 | 3 |
| 0 C (32 F): Frost days (min | 119 | 94 | 1929 | 24 |
| -10 C (14 F): Days with min | 45 | 24 | 1963 | 4 |
| -20 C (-4 F): Days with min | 1 | 1 | 1956 | 1 |
| 20 C (68 F): Tropical nights (min | 20 | 7 | 2020 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 176 | 43 | 2023 | 3 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 133 | 7 | 2024 | 3 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 14 | 2 | 1960 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1911.
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).