Roanoke Threshold Days by Year (USC00447275)
17 fixed thresholds counted per year at Roanoke (USC00447275): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Roanoke Thresholds
- Roanoke: days with a maximum temperature at or above 30 C (86 F) in 51 years, most in 1954 with 103.
- Roanoke: days with a maximum temperature at or above 90 F (32.2 C) in 51 years, most in 1930 with 74.
- Roanoke: nights with a minimum temperature at or below 0 C (32 F) in 51 years, most in 1960 with 116.
- Roanoke: nights with a minimum temperature at or above 20 C (68 F) in 51 years, most in 1959 with 47.
- 17 fixed thresholds have at least one qualifying day at Roanoke.
Days at or above 30 C (86 F)
51 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1912 | 53 | 59.9 |
| 1913 | 54 | 59.9 |
| 1914 | 71 | 59.9 |
| 1915 | 63 | 59.9 |
| 1917 | 56 | 59.9 |
| 1918 | 53 | 59.9 |
| 1919 | 69 | 59.9 |
| 1920 | 23 | 67.7 |
| 1921 | 73 | 67.7 |
| 1922 | 60 | 67.7 |
| 1923 | 68 | 67.7 |
| 1924 | 59 | 67.7 |
| 1925 | 98 | 67.7 |
| 1926 | 89 | 67.7 |
| 1927 | 59 | 67.7 |
| 1928 | 71 | 67.7 |
| 1929 | 77 | 67.7 |
| 1930 | 101 | 84.5 |
| 1931 | 95 | 84.5 |
| 1932 | 88 | 84.5 |
| 1933 | 97 | 84.5 |
| 1934 | 72 | 84.5 |
| 1935 | 61 | 84.5 |
| 1936 | 95 | 84.5 |
| 1937 | 70 | 84.5 |
| 1938 | 72 | 84.5 |
| 1939 | 94 | 84.5 |
| 1940 | 53 | 68.8 |
| 1941 | 97 | 68.8 |
| 1942 | 69 | 68.8 |
| 1943 | 87 | 68.8 |
| 1944 | 85 | 68.8 |
| 1945 | 75 | 68.8 |
| 1946 | 54 | 68.8 |
| 1947 | 55 | 68.8 |
| 1949 | 44 | 68.8 |
| 1950 | 25 | 71.3 |
| 1951 | 63 | 71.3 |
| 1952 | 65 | 71.3 |
| 1953 | 75 | 71.3 |
| 1954 | 103 | 71.3 |
| 1955 | 72 | 71.3 |
| 1956 | 85 | 71.3 |
| 1957 | 75 | 71.3 |
| 1958 | 67 | 71.3 |
| 1959 | 83 | 71.3 |
| 1960 | 63 | 62.8 |
| 1961 | 61 | 62.8 |
| 1962 | 63 | 62.8 |
| 1963 | 60 | 62.8 |
| 1965 | 67 | 62.8 |
| Year | First date | Last date |
|---|---|---|
| 1912 | 1912-05-20 | 1912-09-15 |
| 1913 | 1913-05-02 | 1913-09-07 |
| 1914 | 1914-05-11 | 1914-09-23 |
| 1915 | 1915-04-19 | 1915-09-18 |
| 1917 | 1917-04-18 | 1917-09-08 |
| 1918 | 1918-05-04 | 1918-10-06 |
| 1919 | 1919-05-04 | 1919-10-28 |
| 1920 | 1920-04-22 | 1920-09-27 |
| 1921 | 1921-03-21 | 1921-09-23 |
| 1922 | 1922-04-08 | 1922-10-07 |
| 1923 | 1923-05-19 | 1923-09-24 |
| 1924 | 1924-05-06 | 1924-09-13 |
| 1925 | 1925-04-19 | 1925-09-21 |
| 1926 | 1926-05-01 | 1926-10-05 |
| 1927 | 1927-05-19 | 1927-10-02 |
| 1928 | 1928-05-03 | 1928-10-13 |
| 1929 | 1929-03-24 | 1929-09-30 |
| 1930 | 1930-04-11 | 1930-09-28 |
| 1931 | 1931-05-16 | 1931-10-08 |
| 1932 | 1932-05-05 | 1932-09-23 |
| 1933 | 1933-04-10 | 1933-10-12 |
| 1934 | 1934-04-04 | 1934-09-27 |
| 1935 | 1935-04-27 | 1935-09-22 |
| 1936 | 1936-04-15 | 1936-09-28 |
| 1937 | 1937-04-18 | 1937-10-06 |
| 1938 | 1938-04-27 | 1938-10-19 |
| 1939 | 1939-04-24 | 1939-10-26 |
| 1940 | 1940-05-06 | 1940-10-06 |
| 1941 | 1941-04-13 | 1941-10-15 |
| 1942 | 1942-04-05 | 1942-09-19 |
| 1943 | 1943-04-28 | 1943-10-01 |
| 1944 | 1944-05-01 | 1944-10-07 |
| 1945 | 1945-03-17 | 1945-09-29 |
| 1946 | 1946-04-03 | 1946-09-10 |
| 1947 | 1947-04-24 | 1947-09-15 |
| 1949 | 1949-05-04 | 1949-08-27 |
| 1950 | 1950-04-24 | 1950-09-03 |
| 1951 | 1951-04-26 | 1951-10-06 |
| 1952 | 1952-04-20 | 1952-09-14 |
| 1953 | 1953-05-11 | 1953-10-01 |
| 1954 | 1954-04-19 | 1954-10-13 |
| 1955 | 1955-04-19 | 1955-10-06 |
| 1956 | 1956-04-28 | 1956-09-23 |
| 1957 | 1957-04-21 | 1957-09-22 |
| 1958 | 1958-04-19 | 1958-09-27 |
| 1959 | 1959-04-08 | 1959-10-05 |
| 1960 | 1960-04-14 | 1960-09-10 |
| 1961 | 1961-04-24 | 1961-09-25 |
| 1962 | 1962-04-26 | 1962-10-12 |
| 1963 | 1963-03-30 | 1963-09-12 |
| 1965 | 1965-05-01 | 1965-09-21 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 51 | 103 | 1954 | 67 |
| 35 C (95 F): Days | 47 | 39 | 1930 | 4 |
| 40 C (104 F): Days | 5 | 3 | 1930 | 1 |
| 90 F (32.2 C): Days | 51 | 74 | 1930 | 21 |
| 100 F (37.8 C): Days | 15 | 21 | 1930 | 7 |
| 0 C (32 F): Ice days (max | 48 | 17 | 1935 | 4 |
| 0 C (32 F): Frost days (min | 51 | 116 | 1960 | 69 |
| -10 C (14 F): Days with min | 48 | 22 | 1917 | 5 |
| -20 C (-4 F): Days with min | 2 | 2 | 1917 | 2 |
| 20 C (68 F): Tropical nights (min | 51 | 47 | 1959 | 18 |
| 25 C (77 F): Days with min | 5 | 3 | 1930 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 50 | 45 | 1961 | 23 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 50 | 17 | 1937 | 8 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 38 | 6 | 1937 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 8 | 2 | 1940 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 15 | 6 | 1960 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 2 | 2 | 1960 | 2 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1912.
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).