Princeton Threshold Days by Year (USC00156575)
18 fixed thresholds counted per year at Princeton (USC00156575): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Princeton Thresholds
- Princeton: nights with a minimum temperature at or below 0 C (32 F) in 52 years, most in 1893 with 123.
- Princeton: nights with a minimum temperature at or above 20 C (68 F) in 52 years, most in 1921 with 76.
- Princeton: days with a maximum temperature at or above 30 C (86 F) in 51 years, most in 1953 with 134.
- Princeton: days with a maximum temperature at or above 90 F (32.2 C) in 51 years, most in 1953 with 102.
- 18 fixed thresholds have at least one qualifying day at Princeton.
Days at or above 30 C (86 F)
51 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1893 | 94 | 99.8 |
| 1895 | 92 | 99.8 |
| 1897 | 104 | 99.8 |
| 1898 | 109 | 99.8 |
| 1899 | 100 | 99.8 |
| 1900 | 97 | 90 |
| 1904 | 83 | 90 |
| 1921 | 104 | 70.7 |
| 1922 | 59 | 70.7 |
| 1923 | 49 | 70.7 |
| 1924 | 71 | 70.7 |
| 1925 | 107 | 70.7 |
| 1926 | 77 | 70.7 |
| 1927 | 43 | 70.7 |
| 1928 | 60 | 70.7 |
| 1929 | 66 | 70.7 |
| 1930 | 77 | 98.9 |
| 1931 | 97 | 98.9 |
| 1932 | 98 | 98.9 |
| 1933 | 111 | 98.9 |
| 1934 | 103 | 98.9 |
| 1935 | 91 | 98.9 |
| 1936 | 119 | 98.9 |
| 1937 | 92 | 98.9 |
| 1938 | 91 | 98.9 |
| 1939 | 110 | 98.9 |
| 1940 | 89 | 83.9 |
| 1941 | 117 | 83.9 |
| 1942 | 90 | 83.9 |
| 1943 | 87 | 83.9 |
| 1944 | 103 | 83.9 |
| 1945 | 74 | 83.9 |
| 1946 | 62 | 83.9 |
| 1947 | 75 | 83.9 |
| 1948 | 77 | 83.9 |
| 1949 | 65 | 83.9 |
| 1950 | 29 | 95.6 |
| 1951 | 96 | 95.6 |
| 1952 | 119 | 95.6 |
| 1953 | 134 | 95.6 |
| 1954 | 110 | 95.6 |
| 1955 | 107 | 95.6 |
| 1956 | 104 | 95.6 |
| 1957 | 89 | 95.6 |
| 1958 | 79 | 95.6 |
| 1959 | 89 | 95.6 |
| 1960 | 94 | 89.4 |
| 1961 | 68 | 89.4 |
| 1962 | 89 | 89.4 |
| 1963 | 100 | 89.4 |
| 1964 | 96 | 89.4 |
| Year | First date | Last date |
|---|---|---|
| 1893 | 1893-05-22 | 1893-10-03 |
| 1895 | 1895-04-24 | 1895-09-25 |
| 1897 | 1897-06-02 | 1897-10-18 |
| 1898 | 1898-05-01 | 1898-10-05 |
| 1899 | 1899-04-20 | 1899-10-15 |
| 1900 | 1900-05-07 | 1900-10-05 |
| 1904 | 1904-05-21 | 1904-10-10 |
| 1921 | 1921-04-25 | 1921-09-19 |
| 1922 | 1922-04-07 | 1922-10-05 |
| 1923 | 1923-06-18 | 1923-09-28 |
| 1924 | 1924-04-16 | 1924-10-19 |
| 1925 | 1925-04-19 | 1925-09-30 |
| 1926 | 1926-05-01 | 1926-10-02 |
| 1927 | 1927-05-21 | 1927-10-06 |
| 1928 | 1928-05-03 | 1928-10-13 |
| 1929 | 1929-03-24 | 1929-09-29 |
| 1930 | 1930-04-10 | 1930-09-25 |
| 1931 | 1931-04-16 | 1931-10-13 |
| 1932 | 1932-05-04 | 1932-09-18 |
| 1933 | 1933-05-13 | 1933-10-31 |
| 1934 | 1934-04-04 | 1934-10-24 |
| 1935 | 1935-03-22 | 1935-10-16 |
| 1936 | 1936-04-14 | 1936-10-19 |
| 1937 | 1937-04-17 | 1937-10-06 |
| 1938 | 1938-04-25 | 1938-10-18 |
| 1939 | 1939-05-17 | 1939-10-24 |
| 1940 | 1940-05-06 | 1940-10-28 |
| 1941 | 1941-04-12 | 1941-10-09 |
| 1942 | 1942-04-30 | 1942-09-19 |
| 1943 | 1943-06-01 | 1943-10-11 |
| 1944 | 1944-05-11 | 1944-10-06 |
| 1945 | 1945-03-27 | 1945-09-28 |
| 1946 | 1946-06-08 | 1946-10-10 |
| 1947 | 1947-05-15 | 1947-10-22 |
| 1948 | 1948-04-26 | 1948-09-21 |
| 1949 | 1949-04-23 | 1949-09-17 |
| 1950 | 1950-05-23 | 1950-10-30 |
| 1951 | 1951-04-28 | 1951-10-06 |
| 1952 | 1952-04-20 | 1952-10-01 |
| 1953 | 1953-05-01 | 1953-10-23 |
| 1954 | 1954-04-25 | 1954-10-11 |
| 1955 | 1955-04-05 | 1955-10-06 |
| 1956 | 1956-04-27 | 1956-10-17 |
| 1957 | 1957-04-19 | 1957-10-01 |
| 1958 | 1958-05-12 | 1958-09-26 |
| 1959 | 1959-04-07 | 1959-10-10 |
| 1960 | 1960-04-23 | 1960-10-02 |
| 1961 | 1961-05-31 | 1961-09-24 |
| 1962 | 1962-04-26 | 1962-10-12 |
| 1963 | 1963-04-01 | 1963-10-27 |
| 1964 | 1964-05-16 | 1964-09-22 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 51 | 134 | 1953 | 96 |
| 35 C (95 F): Days | 47 | 61 | 1952 | 21 |
| 40 C (104 F): Days | 11 | 8 | 1954 | 1 |
| 90 F (32.2 C): Days | 51 | 102 | 1953 | 62 |
| 100 F (37.8 C): Days | 28 | 26 | 1936 | 2 |
| 110 F (43.3 C): Days | 1 | 1 | 1952 | 1 |
| 0 C (32 F): Ice days (max | 51 | 30 | 1899 | 5 |
| 0 C (32 F): Frost days (min | 52 | 123 | 1893 | 107 |
| -10 C (14 F): Days with min | 51 | 39 | 1963 | 16 |
| -20 C (-4 F): Days with min | 20 | 5 | 1899 | 5 |
| -30 C (-22 F): Days with min | 2 | 1 | 1951 | 1 |
| 20 C (68 F): Tropical nights (min | 52 | 76 | 1921 | 35 |
| 25 C (77 F): Days with min | 16 | 4 | 1921 | 2 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 47 | 59 | 1950 | 36 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 47 | 24 | 1927 | 12 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 43 | 6 | 1932 | 6 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 12 | 2 | 1935 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 3 | 2 | 1951 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1893.
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).