Spruce Knob Threshold Days by Year
16 fixed thresholds counted per year at Spruce Knob (USC00468433): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Spruce Knob Thresholds
- Spruce Knob: days with 10 mm (0.39 in) or more of precipitation in 37 years, most in 1973 with 46.
- Spruce Knob: days with 25 mm (0.98 in) or more of precipitation in 37 years, most in 1972 with 16.
- Spruce Knob: days with a maximum temperature at or below 0 C (32 F) in 36 years, most in 1960 with 66.
- Spruce Knob: days with 10 cm (3.9 in) or more of snowfall in 35 years, most in 1958 with 24.
- 16 fixed thresholds have at least one qualifying day at Spruce Knob.
Days at or above 30 C (86 F)
22 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1952 | 14 | 8.3 |
| 1953 | 21 | 8.3 |
| 1954 | 4 | 8.3 |
| 1955 | 7 | 8.3 |
| 1957 | 5 | 8.3 |
| 1958 | 1 | 8.3 |
| 1959 | 6 | 8.3 |
| 1962 | 2 | 3 |
| 1964 | 2 | 3 |
| 1965 | 2 | 3 |
| 1966 | 5 | 3 |
| 1968 | 5 | 3 |
| 1969 | 2 | 3 |
| 1971 | 1 | 2.3 |
| 1972 | 1 | 2.3 |
| 1973 | 5 | 2.3 |
| 1974 | 1 | 2.3 |
| 1975 | 3 | 2.3 |
| 1977 | 4 | 2.3 |
| 1978 | 1 | 2.3 |
| 1983 | 5 | 5.5 |
| 1987 | 6 | 5.5 |
| Year | First date | Last date |
|---|---|---|
| 1952 | 1952-06-17 | 1952-09-15 |
| 1953 | 1953-06-22 | 1953-10-01 |
| 1954 | 1954-06-29 | 1954-09-06 |
| 1955 | 1955-07-05 | 1955-08-31 |
| 1957 | 1957-07-22 | 1957-09-03 |
| 1958 | 1958-08-31 | 1958-08-31 |
| 1959 | 1959-07-02 | 1959-08-27 |
| 1962 | 1962-08-21 | 1962-09-14 |
| 1964 | 1964-07-01 | 1964-09-11 |
| 1965 | 1965-08-16 | 1965-08-17 |
| 1966 | 1966-07-03 | 1966-07-29 |
| 1968 | 1968-07-02 | 1968-08-24 |
| 1969 | 1969-06-27 | 1969-07-01 |
| 1971 | 1971-06-29 | 1971-06-29 |
| 1972 | 1972-07-23 | 1972-07-23 |
| 1973 | 1973-08-30 | 1973-09-03 |
| 1974 | 1974-07-10 | 1974-07-10 |
| 1975 | 1975-05-22 | 1975-08-03 |
| 1977 | 1977-07-07 | 1977-09-02 |
| 1978 | 1978-06-28 | 1978-06-28 |
| 1983 | 1983-07-21 | 1983-08-23 |
| 1987 | 1987-07-22 | 1987-08-18 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 22 | 21 | 1953 | 6 |
| 35 C (95 F): Days | 1 | 1 | 1954 | 1 |
| 90 F (32.2 C): Days | 4 | 8 | 1953 | 1 |
| 0 C (32 F): Ice days (max | 36 | 66 | 1960 | 36 |
| 0 C (32 F): Frost days (min | 34 | 171 | 1980 | 140 |
| -10 C (14 F): Days with min | 34 | 70 | 1976 | 27 |
| -20 C (-4 F): Days with min | 30 | 22 | 1977 | 2 |
| -30 C (-22 F): Days with min | 4 | 1 | 1963 | 1 |
| 20 C (68 F): Tropical nights (min | 11 | 7 | 1968 | 2 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 37 | 46 | 1973 | 34 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 37 | 16 | 1972 | 6 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 25 | 3 | 1954 | 2 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 2 | 1 | 1972 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 35 | 24 | 1958 | 11 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 19 | 4 | 1960 | 4 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 2 | 1 | 1962 | 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).