Eureka Rs Threshold Days by Year (USC00242827)
16 fixed thresholds counted per year at Eureka Rs (USC00242827): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Eureka Rs Thresholds
- Eureka Rs: nights with a minimum temperature at or below 0 C (32 F) in 63 years, most in 1977 with 191.
- Eureka Rs: nights with a minimum temperature at or below -10 C (14 F) in 63 years, most in 1969 with 62.
- Eureka Rs: days with 10 mm (0.39 in) or more of precipitation in 63 years, most in 1993 with 16.
- Eureka Rs: days with a maximum temperature at or above 30 C (86 F) in 62 years, most in 1967 with 68.
- 16 fixed thresholds have at least one qualifying day at Eureka Rs.
Days at or above 30 C (86 F)
62 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1961 | 55 | 41.7 |
| 1962 | 32 | 41.7 |
| 1963 | 44 | 41.7 |
| 1964 | 26 | 41.7 |
| 1965 | 36 | 41.7 |
| 1966 | 42 | 41.7 |
| 1967 | 68 | 41.7 |
| 1968 | 29 | 41.7 |
| 1969 | 43 | 41.7 |
| 1970 | 54 | 39.7 |
| 1971 | 46 | 39.7 |
| 1972 | 36 | 39.7 |
| 1973 | 52 | 39.7 |
| 1974 | 37 | 39.7 |
| 1975 | 29 | 39.7 |
| 1976 | 20 | 39.7 |
| 1977 | 40 | 39.7 |
| 1978 | 28 | 39.7 |
| 1979 | 55 | 39.7 |
| 1981 | 35 | 41 |
| 1982 | 38 | 41 |
| 1983 | 17 | 41 |
| 1984 | 39 | 41 |
| 1985 | 54 | 41 |
| 1986 | 45 | 41 |
| 1987 | 51 | 41 |
| 1988 | 55 | 41 |
| 1989 | 35 | 41 |
| 1990 | 52 | 41.8 |
| 1991 | 38 | 41.8 |
| 1992 | 41 | 41.8 |
| 1993 | 15 | 41.8 |
| 1994 | 65 | 41.8 |
| 1995 | 40 | 41.8 |
| 1996 | 44 | 41.8 |
| 1997 | 31 | 41.8 |
| 1998 | 51 | 41.8 |
| 1999 | 41 | 41.8 |
| 2000 | 23 | 46.5 |
| 2001 | 58 | 46.5 |
| 2002 | 35 | 46.5 |
| 2003 | 64 | 46.5 |
| 2004 | 40 | 46.5 |
| 2005 | 33 | 46.5 |
| 2006 | 65 | 46.5 |
| 2007 | 62 | 46.5 |
| 2008 | 40 | 46.5 |
| 2009 | 45 | 46.5 |
| 2010 | 27 | 44.6 |
| 2011 | 57 | 44.6 |
| 2012 | 42 | 44.6 |
| 2015 | 54 | 44.6 |
| 2016 | 34 | 44.6 |
| 2017 | 65 | 44.6 |
| 2018 | 46 | 44.6 |
| 2019 | 32 | 44.6 |
| 2020 | 48 | 52.8 |
| 2021 | 59 | 52.8 |
| 2022 | 45 | 52.8 |
| 2023 | 66 | 52.8 |
| 2024 | 51 | 52.8 |
| 2025 | 48 | 52.8 |
| Year | First date | Last date |
|---|---|---|
| 1961 | 1961-06-15 | 1961-08-30 |
| 1962 | 1962-06-16 | 1962-09-06 |
| 1963 | 1963-05-23 | 1963-09-11 |
| 1964 | 1964-06-25 | 1964-08-18 |
| 1965 | 1965-06-09 | 1965-08-22 |
| 1966 | 1966-05-03 | 1966-09-10 |
| 1967 | 1967-06-17 | 1967-09-29 |
| 1968 | 1968-06-19 | 1968-09-11 |
| 1969 | 1969-05-23 | 1969-09-13 |
| 1970 | 1970-06-02 | 1970-09-01 |
| 1971 | 1971-06-21 | 1971-08-30 |
| 1972 | 1972-05-29 | 1972-08-30 |
| 1973 | 1973-05-14 | 1973-09-12 |
| 1974 | 1974-06-13 | 1974-09-26 |
| 1975 | 1975-07-02 | 1975-09-16 |
| 1976 | 1976-06-28 | 1976-09-03 |
| 1977 | 1977-04-24 | 1977-08-22 |
| 1978 | 1978-06-04 | 1978-09-04 |
| 1979 | 1979-06-11 | 1979-09-16 |
| 1981 | 1981-06-30 | 1981-09-19 |
| 1982 | 1982-06-13 | 1982-09-04 |
| 1983 | 1983-05-29 | 1983-08-15 |
| 1984 | 1984-05-29 | 1984-09-19 |
| 1985 | 1985-05-18 | 1985-08-30 |
| 1986 | 1986-05-26 | 1986-08-30 |
| 1987 | 1987-04-27 | 1987-09-22 |
| 1988 | 1988-05-22 | 1988-09-15 |
| 1989 | 1989-06-05 | 1989-08-13 |
| 1990 | 1990-06-22 | 1990-09-26 |
| 1991 | 1991-07-02 | 1991-10-10 |
| 1992 | 1992-05-05 | 1992-08-20 |
| 1993 | 1993-05-11 | 1993-09-10 |
| 1994 | 1994-05-11 | 1994-09-25 |
| 1995 | 1995-05-28 | 1995-09-15 |
| 1996 | 1996-06-07 | 1996-08-31 |
| 1997 | 1997-06-10 | 1997-09-02 |
| 1998 | 1998-07-07 | 1998-09-16 |
| 1999 | 1999-05-24 | 1999-09-23 |
| 2000 | 2000-06-28 | 2000-09-17 |
| 2001 | 2001-05-22 | 2001-09-25 |
| 2002 | 2002-06-14 | 2002-09-16 |
| 2003 | 2003-05-24 | 2003-09-07 |
| 2004 | 2004-06-04 | 2004-08-20 |
| 2005 | 2005-06-21 | 2005-08-29 |
| 2006 | 2006-05-15 | 2006-09-13 |
| 2007 | 2007-06-02 | 2007-09-16 |
| 2008 | 2008-05-17 | 2008-09-19 |
| 2009 | 2009-05-19 | 2009-09-25 |
| 2010 | 2010-06-28 | 2010-08-27 |
| 2011 | 2011-06-22 | 2011-09-25 |
| 2012 | 2012-05-15 | 2012-08-29 |
| 2015 | 2015-06-07 | 2015-09-13 |
| 2016 | 2016-06-06 | 2016-08-30 |
| 2017 | 2017-05-24 | 2017-09-13 |
| 2018 | 2018-05-16 | 2018-09-08 |
| 2019 | 2019-06-02 | 2019-09-06 |
| 2020 | 2020-06-23 | 2020-09-13 |
| 2021 | 2021-05-17 | 2021-08-16 |
| 2022 | 2022-06-27 | 2022-09-04 |
| 2023 | 2023-05-01 | 2023-09-03 |
| 2024 | 2024-06-22 | 2024-09-10 |
| 2025 | 2025-05-28 | 2025-09-25 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 62 | 68 | 1967 | 48 |
| 35 C (95 F): Days | 60 | 32 | 2003 | 9 |
| 40 C (104 F): Days | 8 | 3 | 1994 | 3 |
| 90 F (32.2 C): Days | 62 | 53 | 1967 | 27 |
| 100 F (37.8 C): Days | 30 | 10 | 1967 | 5 |
| 0 C (32 F): Ice days (max | 62 | 85 | 1985 | 27 |
| 0 C (32 F): Frost days (min | 63 | 191 | 1977 | 69 |
| -10 C (14 F): Days with min | 63 | 62 | 1969 | 24 |
| -20 C (-4 F): Days with min | 58 | 27 | 1972 | 4 |
| -30 C (-22 F): Days with min | 30 | 10 | 1972 | 4 |
| -40 C (-40 F): Days with min | 1 | 3 | 1968 | 3 |
| 20 C (68 F): Tropical nights (min | 9 | 1 | 1987 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 63 | 16 | 1993 | 8 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 33 | 4 | 1995 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 43 | 10 | 2017 | 5 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 6 | 2 | 1964 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1961.
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).