Catoctin Mtn Park Threshold Days by Year (USC00181530)
16 fixed thresholds counted per year at Catoctin Mtn Park (USC00181530): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Catoctin Mtn Park Thresholds
- Catoctin Mtn Park: nights with a minimum temperature at or below 0 C (32 F) in 41 years, most in 1969 with 131.
- Catoctin Mtn Park: nights with a minimum temperature at or below -10 C (14 F) in 41 years, most in 1977 with 42.
- Catoctin Mtn Park: nights with a minimum temperature at or above 20 C (68 F) in 41 years, most in 1988 with 38.
- Catoctin Mtn Park: days with 10 mm (0.39 in) or more of precipitation in 41 years, most in 1996 with 63.
- 16 fixed thresholds have at least one qualifying day at Catoctin Mtn Park.
Days at or above 30 C (86 F)
38 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1968 | 17 | 13 |
| 1969 | 9 | 13 |
| 1970 | 5 | 7.5 |
| 1971 | 6 | 7.5 |
| 1972 | 7 | 7.5 |
| 1973 | 15 | 7.5 |
| 1974 | 10 | 7.5 |
| 1975 | 6 | 7.5 |
| 1976 | 4 | 7.5 |
| 1977 | 16 | 7.5 |
| 1978 | 4 | 7.5 |
| 1979 | 2 | 7.5 |
| 1980 | 7 | 10 |
| 1981 | 5 | 10 |
| 1982 | 4 | 10 |
| 1983 | 20 | 10 |
| 1984 | 5 | 10 |
| 1985 | 3 | 10 |
| 1986 | 8 | 10 |
| 1987 | 18 | 10 |
| 1988 | 27 | 10 |
| 1989 | 3 | 10 |
| 1990 | 10 | 18.3 |
| 1992 | 3 | 18.3 |
| 1993 | 24 | 18.3 |
| 1994 | 11 | 18.3 |
| 1995 | 32 | 18.3 |
| 1996 | 10 | 18.3 |
| 1997 | 21 | 18.3 |
| 1998 | 20 | 18.3 |
| 1999 | 34 | 18.3 |
| 2000 | 11 | 19.7 |
| 2001 | 19 | 19.7 |
| 2002 | 44 | 19.7 |
| 2003 | 7 | 19.7 |
| 2004 | 8 | 19.7 |
| 2005 | 26 | 19.7 |
| 2009 | 23 | 19.7 |
| Year | First date | Last date |
|---|---|---|
| 1968 | 1968-06-30 | 1968-08-25 |
| 1969 | 1969-05-29 | 1969-07-18 |
| 1970 | 1970-05-23 | 1970-09-24 |
| 1971 | 1971-05-19 | 1971-09-06 |
| 1972 | 1972-07-20 | 1972-08-25 |
| 1973 | 1973-06-10 | 1973-09-01 |
| 1974 | 1974-04-29 | 1974-09-12 |
| 1975 | 1975-05-22 | 1975-08-26 |
| 1976 | 1976-04-17 | 1976-04-20 |
| 1977 | 1977-05-29 | 1977-08-07 |
| 1978 | 1978-06-28 | 1978-07-24 |
| 1979 | 1979-05-09 | 1979-10-21 |
| 1980 | 1980-07-16 | 1980-09-01 |
| 1981 | 1981-06-15 | 1981-07-10 |
| 1982 | 1982-07-19 | 1982-07-27 |
| 1983 | 1983-07-15 | 1983-09-12 |
| 1984 | 1984-06-09 | 1984-07-11 |
| 1985 | 1985-04-21 | 1985-04-23 |
| 1986 | 1986-05-06 | 1986-08-02 |
| 1987 | 1987-05-30 | 1987-08-19 |
| 1988 | 1988-06-14 | 1988-08-17 |
| 1989 | 1989-06-01 | 1989-07-11 |
| 1990 | 1990-04-26 | 1990-08-29 |
| 1992 | 1992-05-02 | 1992-07-14 |
| 1993 | 1993-05-11 | 1993-09-02 |
| 1994 | 1994-04-25 | 1994-07-21 |
| 1995 | 1995-04-20 | 1995-08-31 |
| 1996 | 1996-05-18 | 1996-08-23 |
| 1997 | 1997-06-20 | 1997-08-18 |
| 1998 | 1998-03-30 | 1998-09-27 |
| 1999 | 1999-05-30 | 1999-08-14 |
| 2000 | 2000-05-07 | 2000-08-07 |
| 2001 | 2001-04-23 | 2001-08-10 |
| 2002 | 2002-04-16 | 2002-09-10 |
| 2003 | 2003-06-24 | 2003-08-22 |
| 2004 | 2004-04-19 | 2004-08-28 |
| 2005 | 2005-06-06 | 2005-09-15 |
| 2009 | 2009-04-25 | 2009-08-27 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 38 | 44 | 2002 | 23 |
| 35 C (95 F): Days | 6 | 2 | 1988 | 1 |
| 90 F (32.2 C): Days | 23 | 17 | 2002 | 5 |
| 0 C (32 F): Ice days (max | 38 | 57 | 1978 | 19 |
| 0 C (32 F): Frost days (min | 41 | 131 | 1969 | 83 |
| -10 C (14 F): Days with min | 41 | 42 | 1977 | 16 |
| -20 C (-4 F): Days with min | 13 | 6 | 1970 | 1 |
| 20 C (68 F): Tropical nights (min | 41 | 38 | 1988 | 9 |
| 25 C (77 F): Days with min | 1 | 2 | 1988 | 2 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 41 | 63 | 1996 | 44 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 41 | 25 | 1996 | 10 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 39 | 7 | 2004 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 10 | 2 | 1984 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 35 | 7 | 1996 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 10 | 2 | 1968 | 1 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 2 | 1 | 1971 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1968.
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).