Grass Valley #2 Threshold Days by Year
17 fixed thresholds counted per year at Grass Valley #2 (USC00043573): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Grass Valley #2 Thresholds
- Grass Valley #2: days with a maximum temperature at or above 30 C (86 F) in 58 years, most in 2020 with 97.
- Grass Valley #2: days with a maximum temperature at or above 35 C (95 F) in 58 years, most in 2021 with 34.
- Grass Valley #2: days with a maximum temperature at or above 90 F (32.2 C) in 58 years, most in 2024 with 72.
- Grass Valley #2: nights with a minimum temperature at or below 0 C (32 F) in 58 years, most in 1982 with 113.
- 17 fixed thresholds have at least one qualifying day at Grass Valley #2.
Days at or above 30 C (86 F)
58 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1967 | 90 | 77.7 |
| 1968 | 70 | 77.7 |
| 1969 | 73 | 77.7 |
| 1970 | 90 | 67.5 |
| 1971 | 77 | 67.5 |
| 1972 | 64 | 67.5 |
| 1973 | 69 | 67.5 |
| 1974 | 86 | 67.5 |
| 1975 | 69 | 67.5 |
| 1976 | 47 | 67.5 |
| 1977 | 65 | 67.5 |
| 1978 | 54 | 67.5 |
| 1979 | 54 | 67.5 |
| 1980 | 44 | 60.8 |
| 1981 | 75 | 60.8 |
| 1982 | 41 | 60.8 |
| 1983 | 56 | 60.8 |
| 1984 | 81 | 60.8 |
| 1985 | 64 | 60.8 |
| 1986 | 64 | 60.8 |
| 1987 | 67 | 60.8 |
| 1988 | 67 | 60.8 |
| 1989 | 49 | 60.8 |
| 1990 | 54 | 58.2 |
| 1991 | 73 | 58.2 |
| 1992 | 71 | 58.2 |
| 1993 | 51 | 58.2 |
| 1994 | 66 | 58.2 |
| 1995 | 46 | 58.2 |
| 1996 | 72 | 58.2 |
| 1997 | 51 | 58.2 |
| 1998 | 50 | 58.2 |
| 1999 | 48 | 58.2 |
| 2000 | 59 | 69.6 |
| 2001 | 67 | 69.6 |
| 2002 | 73 | 69.6 |
| 2003 | 73 | 69.6 |
| 2004 | 60 | 69.6 |
| 2005 | 63 | 69.6 |
| 2008 | 87 | 69.6 |
| 2009 | 75 | 69.6 |
| 2010 | 58 | 70.5 |
| 2011 | 58 | 70.5 |
| 2012 | 74 | 70.5 |
| 2013 | 66 | 70.5 |
| 2014 | 74 | 70.5 |
| 2015 | 74 | 70.5 |
| 2016 | 72 | 70.5 |
| 2017 | 84 | 70.5 |
| 2018 | 75 | 70.5 |
| 2019 | 70 | 70.5 |
| 2020 | 97 | 82.6 |
| 2021 | 87 | 82.6 |
| 2022 | 86 | 82.6 |
| 2023 | 70 | 82.6 |
| 2024 | 89 | 82.6 |
| 2025 | 70 | 82.6 |
| 2026 | 79 | 82.6 |
| Year | First date | Last date |
|---|---|---|
| 1967 | 1967-05-18 | 1967-09-29 |
| 1968 | 1968-06-02 | 1968-09-29 |
| 1969 | 1969-05-30 | 1969-09-29 |
| 1970 | 1970-05-15 | 1970-10-04 |
| 1971 | 1971-06-16 | 1971-10-14 |
| 1972 | 1972-05-13 | 1972-09-16 |
| 1973 | 1973-05-14 | 1973-09-29 |
| 1974 | 1974-05-26 | 1974-10-19 |
| 1975 | 1975-05-14 | 1975-10-02 |
| 1976 | 1976-05-13 | 1976-10-13 |
| 1977 | 1977-06-01 | 1977-09-12 |
| 1978 | 1978-06-05 | 1978-10-15 |
| 1979 | 1979-05-18 | 1979-10-04 |
| 1980 | 1980-05-21 | 1980-10-10 |
| 1981 | 1981-04-29 | 1981-09-19 |
| 1982 | 1982-05-24 | 1982-09-09 |
| 1983 | 1983-05-25 | 1983-10-27 |
| 1984 | 1984-05-23 | 1984-09-20 |
| 1985 | 1985-04-15 | 1985-10-06 |
| 1986 | 1986-05-30 | 1986-09-08 |
| 1987 | 1987-04-28 | 1987-10-07 |
| 1988 | 1988-05-22 | 1988-10-18 |
| 1989 | 1989-04-08 | 1989-09-24 |
| 1990 | 1990-05-05 | 1990-10-04 |
| 1991 | 1991-06-10 | 1991-10-21 |
| 1992 | 1992-05-04 | 1992-10-13 |
| 1993 | 1993-06-18 | 1993-10-27 |
| 1994 | 1994-06-10 | 1994-09-27 |
| 1995 | 1995-06-24 | 1995-09-22 |
| 1996 | 1996-05-13 | 1996-10-11 |
| 1997 | 1997-05-18 | 1997-09-30 |
| 1998 | 1998-07-07 | 1998-09-17 |
| 1999 | 1999-05-23 | 1999-10-14 |
| 2000 | 2000-05-22 | 2000-09-21 |
| 2001 | 2001-05-20 | 2001-10-13 |
| 2002 | 2002-05-31 | 2002-09-27 |
| 2003 | 2003-05-24 | 2003-10-26 |
| 2004 | 2004-06-03 | 2004-10-14 |
| 2005 | 2005-06-30 | 2005-09-29 |
| 2008 | 2008-05-16 | 2008-10-02 |
| 2009 | 2009-04-22 | 2009-09-29 |
| 2010 | 2010-06-27 | 2010-10-15 |
| 2011 | 2011-06-21 | 2011-09-30 |
| 2012 | 2012-06-01 | 2012-10-04 |
| 2013 | 2013-05-13 | 2013-09-15 |
| 2014 | 2014-05-26 | 2014-10-13 |
| 2015 | 2015-05-31 | 2015-10-14 |
| 2016 | 2016-06-01 | 2016-09-29 |
| 2017 | 2017-05-23 | 2017-10-25 |
| 2018 | 2018-05-30 | 2018-09-28 |
| 2019 | 2019-06-05 | 2019-10-24 |
| 2020 | 2020-05-26 | 2020-10-21 |
| 2021 | 2021-05-31 | 2021-09-26 |
| 2022 | 2022-05-19 | 2022-10-15 |
| 2023 | 2023-05-14 | 2023-10-20 |
| 2024 | 2024-05-16 | 2024-10-10 |
| 2025 | 2025-05-31 | 2025-09-28 |
| 2026 | 2026-06-06 | 2026-10-10 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 58 | 97 | 2020 | 79 |
| 35 C (95 F): Days | 58 | 34 | 2021 | 10 |
| 40 C (104 F): Days | 8 | 3 | 1972 | 2 |
| 90 F (32.2 C): Days | 58 | 72 | 2024 | 54 |
| 100 F (37.8 C): Days | 31 | 12 | 2024 | 12 |
| 0 C (32 F): Ice days (max | 8 | 1 | 1972 | 1 |
| 0 C (32 F): Frost days (min | 58 | 113 | 1982 | 19 |
| -10 C (14 F): Days with min | 3 | 8 | 1972 | 3 |
| 20 C (68 F): Tropical nights (min | 20 | 8 | 2003 | 6 |
| 25 C (77 F): Days with min | 1 | 1 | 2020 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 58 | 72 | 1983 | 23 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 58 | 35 | 1996 | 14 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 55 | 16 | 1996 | 2 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 27 | 3 | 1983 | 1 |
| 200 mm (7.87 in): Days with 200 mm or more rain | 1 | 1 | 2021 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 23 | 4 | 1967 | 2 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 3 | 1 | 1968 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1967.
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).