Roxbury Threshold Days by Year (USC00307317)
17 fixed thresholds counted per year at Roxbury (USC00307317): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Roxbury Thresholds
- Roxbury: days with 10 mm (0.39 in) or more of precipitation in 53 years, most in 1948 with 47.
- Roxbury: days with 25 mm (0.98 in) or more of precipitation in 53 years, most in 1920 with 12.
- Roxbury: days with a maximum temperature at or above 30 C (86 F) in 51 years, most in 1949 with 44.
- Roxbury: days with a maximum temperature at or below 0 C (32 F) in 51 years, most in 1920 with 68.
- 17 fixed thresholds have at least one qualifying day at Roxbury.
Days at or above 30 C (86 F)
51 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1916 | 20 | 18.8 |
| 1917 | 13 | 18.8 |
| 1918 | 21 | 18.8 |
| 1919 | 21 | 18.8 |
| 1920 | 5 | 8.5 |
| 1922 | 3 | 8.5 |
| 1923 | 13 | 8.5 |
| 1924 | 8 | 8.5 |
| 1925 | 12 | 8.5 |
| 1926 | 2 | 8.5 |
| 1927 | 8 | 8.5 |
| 1928 | 17 | 8.5 |
| 1930 | 21 | 23.1 |
| 1931 | 19 | 23.1 |
| 1932 | 20 | 23.1 |
| 1933 | 31 | 23.1 |
| 1934 | 27 | 23.1 |
| 1935 | 14 | 23.1 |
| 1936 | 26 | 23.1 |
| 1937 | 28 | 23.1 |
| 1938 | 20 | 23.1 |
| 1939 | 25 | 23.1 |
| 1940 | 16 | 22.8 |
| 1941 | 18 | 22.8 |
| 1942 | 20 | 22.8 |
| 1943 | 29 | 22.8 |
| 1944 | 39 | 22.8 |
| 1945 | 16 | 22.8 |
| 1946 | 9 | 22.8 |
| 1947 | 22 | 22.8 |
| 1948 | 15 | 22.8 |
| 1949 | 44 | 22.8 |
| 1950 | 8 | 18.9 |
| 1952 | 28 | 18.9 |
| 1953 | 30 | 18.9 |
| 1954 | 14 | 18.9 |
| 1955 | 43 | 18.9 |
| 1956 | 8 | 18.9 |
| 1957 | 15 | 18.9 |
| 1958 | 5 | 18.9 |
| 1960 | 1 | 10.8 |
| 1961 | 9 | 10.8 |
| 1962 | 12 | 10.8 |
| 1963 | 16 | 10.8 |
| 1964 | 14 | 10.8 |
| 1965 | 11 | 10.8 |
| 1966 | 14 | 10.8 |
| 1967 | 7 | 10.8 |
| 1968 | 13 | 10.8 |
| 1970 | 15 | 12.5 |
| 1971 | 10 | 12.5 |
| Year | First date | Last date |
|---|---|---|
| 1916 | 1916-07-11 | 1916-08-23 |
| 1917 | 1917-07-22 | 1917-08-21 |
| 1918 | 1918-06-01 | 1918-08-24 |
| 1919 | 1919-05-31 | 1919-09-08 |
| 1920 | 1920-06-02 | 1920-08-09 |
| 1922 | 1922-07-12 | 1922-08-18 |
| 1923 | 1923-06-18 | 1923-08-11 |
| 1924 | 1924-07-24 | 1924-09-01 |
| 1925 | 1925-06-03 | 1925-09-12 |
| 1926 | 1926-08-03 | 1926-08-13 |
| 1927 | 1927-06-29 | 1927-10-02 |
| 1928 | 1928-05-04 | 1928-08-29 |
| 1930 | 1930-05-21 | 1930-08-09 |
| 1931 | 1931-05-28 | 1931-09-22 |
| 1932 | 1932-05-16 | 1932-09-13 |
| 1933 | 1933-06-03 | 1933-08-26 |
| 1934 | 1934-05-31 | 1934-08-08 |
| 1935 | 1935-06-27 | 1935-08-18 |
| 1936 | 1936-05-08 | 1936-08-23 |
| 1937 | 1937-05-31 | 1937-09-04 |
| 1938 | 1938-06-21 | 1938-08-17 |
| 1939 | 1939-05-31 | 1939-09-16 |
| 1940 | 1940-06-04 | 1940-08-17 |
| 1941 | 1941-04-20 | 1941-10-05 |
| 1942 | 1942-06-10 | 1942-09-17 |
| 1943 | 1943-05-17 | 1943-09-06 |
| 1944 | 1944-05-04 | 1944-09-02 |
| 1945 | 1945-06-14 | 1945-09-09 |
| 1946 | 1946-06-08 | 1946-09-20 |
| 1947 | 1947-06-10 | 1947-09-14 |
| 1948 | 1948-06-24 | 1948-09-13 |
| 1949 | 1949-05-05 | 1949-10-11 |
| 1950 | 1950-06-07 | 1950-08-18 |
| 1952 | 1952-06-17 | 1952-09-13 |
| 1953 | 1953-05-11 | 1953-09-05 |
| 1954 | 1954-06-01 | 1954-09-07 |
| 1955 | 1955-05-04 | 1955-08-24 |
| 1956 | 1956-06-12 | 1956-08-18 |
| 1957 | 1957-06-15 | 1957-09-22 |
| 1958 | 1958-07-01 | 1958-08-31 |
| 1960 | 1960-09-08 | 1960-09-08 |
| 1961 | 1961-05-14 | 1961-09-10 |
| 1962 | 1962-04-27 | 1962-09-01 |
| 1963 | 1963-06-25 | 1963-07-29 |
| 1964 | 1964-06-20 | 1964-09-23 |
| 1965 | 1965-06-07 | 1965-08-17 |
| 1966 | 1966-06-25 | 1966-08-11 |
| 1967 | 1967-06-09 | 1967-07-10 |
| 1968 | 1968-06-08 | 1968-08-25 |
| 1970 | 1970-06-01 | 1970-09-25 |
| 1971 | 1971-05-19 | 1971-09-06 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 51 | 44 | 1949 | 10 |
| 35 C (95 F): Days | 17 | 8 | 1933 | 1 |
| 90 F (32.2 C): Days | 44 | 28 | 1955 | 1 |
| 100 F (37.8 C): Days | 3 | 1 | 1919 | 1 |
| 0 C (32 F): Ice days (max | 51 | 68 | 1920 | 38 |
| 0 C (32 F): Frost days (min | 51 | 198 | 1962 | 176 |
| -10 C (14 F): Days with min | 51 | 73 | 1926 | 51 |
| -20 C (-4 F): Days with min | 50 | 26 | 1948 | 15 |
| -30 C (-22 F): Days with min | 15 | 5 | 1948 | 1 |
| 20 C (68 F): Tropical nights (min | 34 | 6 | 1957 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 53 | 47 | 1948 | 25 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 53 | 12 | 1920 | 7 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 30 | 3 | 1927 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 2 | 1 | 1932 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 38 | 9 | 1943 | 3 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 19 | 4 | 1958 | 1 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 4 | 1 | 1932 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1916.
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).