Rock Springs Threshold Days by Year
18 fixed thresholds counted per year at Rock Springs (USC00247136): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Rock Springs Thresholds
- Rock Springs: days with 10 mm (0.39 in) or more of precipitation in 54 years, most in 1953 with 17.
- Rock Springs: days with a maximum temperature at or above 30 C (86 F) in 50 years, most in 1988 with 69.
- Rock Springs: days with a maximum temperature at or above 90 F (32.2 C) in 50 years, most in 1988 with 52.
- Rock Springs: days with a maximum temperature at or below 0 C (32 F) in 50 years, most in 1978 with 104.
- 18 fixed thresholds have at least one qualifying day at Rock Springs.
Days at or above 30 C (86 F)
50 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1952 | 50 | 44.1 |
| 1953 | 39 | 44.1 |
| 1954 | 42 | 44.1 |
| 1955 | 46 | 44.1 |
| 1956 | 43 | 44.1 |
| 1957 | 43 | 44.1 |
| 1958 | 40 | 44.1 |
| 1959 | 50 | 44.1 |
| 1960 | 58 | 44.2 |
| 1961 | 63 | 44.2 |
| 1962 | 29 | 44.2 |
| 1963 | 50 | 44.2 |
| 1964 | 39 | 44.2 |
| 1965 | 26 | 44.2 |
| 1973 | 33 | 37.1 |
| 1974 | 42 | 37.1 |
| 1975 | 30 | 37.1 |
| 1976 | 49 | 37.1 |
| 1977 | 34 | 37.1 |
| 1978 | 30 | 37.1 |
| 1979 | 42 | 37.1 |
| 1980 | 40 | 44.1 |
| 1981 | 48 | 44.1 |
| 1982 | 32 | 44.1 |
| 1983 | 52 | 44.1 |
| 1984 | 51 | 44.1 |
| 1985 | 36 | 44.1 |
| 1986 | 32 | 44.1 |
| 1987 | 38 | 44.1 |
| 1988 | 69 | 44.1 |
| 1989 | 43 | 44.1 |
| 1990 | 55 | 41.1 |
| 1991 | 43 | 41.1 |
| 1992 | 25 | 41.1 |
| 1993 | 10 | 41.1 |
| 1994 | 47 | 41.1 |
| 1995 | 45 | 41.1 |
| 1996 | 45 | 41.1 |
| 1997 | 44 | 41.1 |
| 1998 | 58 | 41.1 |
| 1999 | 39 | 41.1 |
| 2000 | 54 | 49.8 |
| 2001 | 53 | 49.8 |
| 2002 | 46 | 49.8 |
| 2003 | 60 | 49.8 |
| 2004 | 32 | 49.8 |
| 2005 | 52 | 49.8 |
| 2006 | 57 | 49.8 |
| 2007 | 58 | 49.8 |
| 2008 | 36 | 49.8 |
| Year | First date | Last date |
|---|---|---|
| 1952 | 1952-04-26 | 1952-09-26 |
| 1953 | 1953-05-07 | 1953-10-01 |
| 1954 | 1954-05-19 | 1954-09-11 |
| 1955 | 1955-06-14 | 1955-10-10 |
| 1956 | 1956-05-19 | 1956-09-26 |
| 1957 | 1957-06-03 | 1957-10-01 |
| 1958 | 1958-05-11 | 1958-09-19 |
| 1959 | 1959-06-03 | 1959-09-13 |
| 1960 | 1960-05-12 | 1960-09-19 |
| 1961 | 1961-05-29 | 1961-08-31 |
| 1962 | 1962-06-26 | 1962-08-27 |
| 1963 | 1963-06-27 | 1963-10-04 |
| 1964 | 1964-05-17 | 1964-09-17 |
| 1965 | 1965-07-07 | 1965-09-01 |
| 1973 | 1973-06-13 | 1973-08-30 |
| 1974 | 1974-04-25 | 1974-08-19 |
| 1975 | 1975-06-24 | 1975-08-28 |
| 1976 | 1976-05-28 | 1976-09-17 |
| 1977 | 1977-05-09 | 1977-08-25 |
| 1978 | 1978-05-15 | 1978-09-10 |
| 1979 | 1979-05-27 | 1979-09-16 |
| 1980 | 1980-04-20 | 1980-10-08 |
| 1981 | 1981-05-01 | 1981-09-19 |
| 1982 | 1982-06-22 | 1982-09-09 |
| 1983 | 1983-06-10 | 1983-09-26 |
| 1984 | 1984-05-15 | 1984-09-18 |
| 1985 | 1985-05-02 | 1985-08-30 |
| 1986 | 1986-05-30 | 1986-08-28 |
| 1987 | 1987-04-29 | 1987-10-03 |
| 1988 | 1988-05-13 | 1988-09-06 |
| 1989 | 1989-06-19 | 1989-09-30 |
| 1990 | 1990-06-09 | 1990-09-25 |
| 1991 | 1991-06-11 | 1991-09-07 |
| 1992 | 1992-05-06 | 1992-10-03 |
| 1993 | 1993-05-13 | 1993-09-11 |
| 1994 | 1994-05-27 | 1994-09-10 |
| 1995 | 1995-06-13 | 1995-09-15 |
| 1996 | 1996-06-08 | 1996-09-04 |
| 1997 | 1997-05-31 | 1997-10-02 |
| 1998 | 1998-05-26 | 1998-09-18 |
| 1999 | 1999-05-28 | 1999-08-30 |
| 2000 | 2000-06-07 | 2000-09-17 |
| 2001 | 2001-05-12 | 2001-09-28 |
| 2002 | 2002-05-21 | 2002-09-17 |
| 2003 | 2003-05-29 | 2003-09-08 |
| 2004 | 2004-06-05 | 2004-09-12 |
| 2005 | 2005-06-16 | 2005-09-09 |
| 2006 | 2006-05-18 | 2006-09-13 |
| 2007 | 2007-06-19 | 2007-09-16 |
| 2008 | 2008-07-04 | 2008-09-20 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 50 | 69 | 1988 | 36 |
| 35 C (95 F): Days | 49 | 31 | 1960 | 12 |
| 40 C (104 F): Days | 14 | 4 | 1988 | 3 |
| 90 F (32.2 C): Days | 50 | 52 | 1988 | 22 |
| 100 F (37.8 C): Days | 38 | 15 | 1988 | 2 |
| 0 C (32 F): Ice days (max | 50 | 104 | 1978 | 57 |
| 0 C (32 F): Frost days (min | 50 | 206 | 1984 | 196 |
| -10 C (14 F): Days with min | 50 | 109 | 1955 | 77 |
| -20 C (-4 F): Days with min | 50 | 47 | 1996 | 14 |
| -30 C (-22 F): Days with min | 42 | 14 | 1963 | 1 |
| -40 C (-40 F): Days with min | 2 | 1 | 1954 | 1 |
| 20 C (68 F): Tropical nights (min | 36 | 18 | 2005 | 3 |
| 25 C (77 F): Days with min | 2 | 1 | 1954 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 54 | 17 | 1953 | 8 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 41 | 4 | 1973 | 2 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 3 | 1 | 1964 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 8 | 3 | 1952 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 1 | 1 | 2004 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1952.
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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2025-12-31).