Challenge Rs Threshold Days by Year (USC00041653)
7 fixed thresholds counted per year at Challenge Rs (USC00041653): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Challenge Rs Thresholds
- Challenge Rs: days with 10 mm (0.39 in) or more of precipitation in 45 years, most in 1941 with 62.
- Challenge Rs: days with 25 mm (0.98 in) or more of precipitation in 45 years, most in 1940 with 37.
- Challenge Rs: days with 50 mm (1.97 in) or more of precipitation in 44 years, most in 1950 with 18.
- Challenge Rs: days with 100 mm (3.94 in) or more of precipitation in 29 years, most in 1940 with 6.
- 7 fixed thresholds have at least one qualifying day at Challenge Rs.
Days with 10 mm (0.39 in) or more of precipitation
45 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1939 | 25 | 25 |
| 1940 | 56 | 41.1 |
| 1941 | 62 | 41.1 |
| 1942 | 47 | 41.1 |
| 1943 | 34 | 41.1 |
| 1944 | 45 | 41.1 |
| 1945 | 47 | 41.1 |
| 1946 | 24 | 41.1 |
| 1947 | 28 | 41.1 |
| 1948 | 43 | 41.1 |
| 1949 | 25 | 41.1 |
| 1950 | 48 | 42.1 |
| 1951 | 42 | 42.1 |
| 1952 | 54 | 42.1 |
| 1953 | 44 | 42.1 |
| 1954 | 40 | 42.1 |
| 1955 | 44 | 42.1 |
| 1956 | 31 | 42.1 |
| 1957 | 43 | 42.1 |
| 1958 | 48 | 42.1 |
| 1959 | 27 | 42.1 |
| 1960 | 42 | 38.8 |
| 1961 | 36 | 38.8 |
| 1962 | 35 | 38.8 |
| 1963 | 36 | 38.8 |
| 1964 | 36 | 38.8 |
| 1965 | 35 | 38.8 |
| 1966 | 34 | 38.8 |
| 1967 | 47 | 38.8 |
| 1968 | 39 | 38.8 |
| 1969 | 48 | 38.8 |
| 1970 | 45 | 34.9 |
| 1971 | 34 | 34.9 |
| 1972 | 42 | 34.9 |
| 1973 | 61 | 34.9 |
| 1974 | 30 | 34.9 |
| 1975 | 30 | 34.9 |
| 1976 | 10 | 34.9 |
| 1977 | 26 | 34.9 |
| 1978 | 37 | 34.9 |
| 1979 | 34 | 34.9 |
| 1980 | 20 | 20 |
| 1990 | 20 | 28 |
| 1991 | 21 | 28 |
| 1993 | 43 | 28 |
| Year | First date | Last date |
|---|---|---|
| 1939 | 1939-01-03 | 1939-12-31 |
| 1940 | 1940-01-01 | 1940-12-30 |
| 1941 | 1941-01-04 | 1941-12-29 |
| 1942 | 1942-01-07 | 1942-12-29 |
| 1943 | 1943-01-20 | 1943-12-30 |
| 1944 | 1944-01-02 | 1944-12-30 |
| 1945 | 1945-01-18 | 1945-12-29 |
| 1946 | 1946-01-03 | 1946-12-25 |
| 1947 | 1947-01-28 | 1947-12-17 |
| 1948 | 1948-01-02 | 1948-12-27 |
| 1949 | 1949-01-01 | 1949-12-16 |
| 1950 | 1950-01-08 | 1950-12-15 |
| 1951 | 1951-01-03 | 1951-12-30 |
| 1952 | 1952-01-06 | 1952-12-30 |
| 1953 | 1953-01-06 | 1953-12-07 |
| 1954 | 1954-01-03 | 1954-12-31 |
| 1955 | 1955-01-01 | 1955-12-31 |
| 1956 | 1956-01-01 | 1956-12-05 |
| 1957 | 1957-01-12 | 1957-12-29 |
| 1958 | 1958-01-02 | 1958-12-27 |
| 1959 | 1959-01-05 | 1959-12-25 |
| 1960 | 1960-01-08 | 1960-12-17 |
| 1961 | 1961-01-26 | 1961-12-21 |
| 1962 | 1962-01-19 | 1962-12-17 |
| 1963 | 1963-01-30 | 1963-12-20 |
| 1964 | 1964-01-18 | 1964-12-31 |
| 1965 | 1965-01-03 | 1965-12-31 |
| 1966 | 1966-01-04 | 1966-12-10 |
| 1967 | 1967-01-20 | 1967-12-18 |
| 1968 | 1968-01-10 | 1968-12-28 |
| 1969 | 1969-01-11 | 1969-12-25 |
| 1970 | 1970-01-09 | 1970-12-29 |
| 1971 | 1971-01-11 | 1971-12-25 |
| 1972 | 1972-01-22 | 1972-12-22 |
| 1973 | 1973-01-09 | 1973-12-29 |
| 1974 | 1974-01-14 | 1974-12-04 |
| 1975 | 1975-01-06 | 1975-12-22 |
| 1976 | 1976-01-09 | 1976-12-30 |
| 1977 | 1977-01-02 | 1977-12-30 |
| 1978 | 1978-01-04 | 1978-12-18 |
| 1979 | 1979-01-08 | 1979-12-21 |
| 1980 | 1980-01-02 | 1980-12-04 |
| 1990 | 1990-01-02 | 1990-12-12 |
| 1991 | 1991-02-05 | 1991-12-19 |
| 1993 | 1993-01-01 | 1993-12-15 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 10 mm (0.39 in): Days with 10 mm or more rain | 45 | 62 | 1941 | 43 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 45 | 37 | 1940 | 25 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 44 | 18 | 1950 | 11 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 29 | 6 | 1940 | 2 |
| 200 mm (7.87 in): Days with 200 mm or more rain | 3 | 1 | 1960 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 18 | 9 | 1952 | 3 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 7 | 2 | 1949 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1939.
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).