St Catharines Threshold Days by Year
16 fixed thresholds counted per year at St Catharines (CA006137285): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for St Catharines Thresholds
- St Catharines: days with 10 mm (0.39 in) or more of precipitation in 53 years, most in 1955 with 33.
- St Catharines: days with 25 mm (0.98 in) or more of precipitation in 53 years, most in 1945 with 9.
- St Catharines: days with a maximum temperature at or above 30 C (86 F) in 52 years, most in 1949 with 53.
- St Catharines: days with a maximum temperature at or below 0 C (32 F) in 52 years, most in 1940 with 74.
- 16 fixed thresholds have at least one qualifying day at St Catharines.
Days at or above 30 C (86 F)
52 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1902 | 16 | 16 |
| 1915 | 15 | 24.5 |
| 1919 | 34 | 24.5 |
| 1920 | 13 | 17.8 |
| 1921 | 34 | 17.8 |
| 1922 | 20 | 17.8 |
| 1923 | 26 | 17.8 |
| 1924 | 13 | 17.8 |
| 1925 | 19 | 17.8 |
| 1926 | 11 | 17.8 |
| 1927 | 8 | 17.8 |
| 1928 | 13 | 17.8 |
| 1929 | 21 | 17.8 |
| 1930 | 25 | 23.9 |
| 1931 | 26 | 23.9 |
| 1932 | 9 | 23.9 |
| 1933 | 33 | 23.9 |
| 1934 | 21 | 23.9 |
| 1935 | 23 | 23.9 |
| 1936 | 31 | 23.9 |
| 1937 | 23 | 23.9 |
| 1938 | 22 | 23.9 |
| 1939 | 26 | 23.9 |
| 1940 | 18 | 29.9 |
| 1941 | 31 | 29.9 |
| 1942 | 16 | 29.9 |
| 1943 | 30 | 29.9 |
| 1944 | 30 | 29.9 |
| 1945 | 28 | 29.9 |
| 1946 | 26 | 29.9 |
| 1947 | 32 | 29.9 |
| 1948 | 35 | 29.9 |
| 1949 | 53 | 29.9 |
| 1950 | 20 | 27.3 |
| 1951 | 17 | 27.3 |
| 1952 | 36 | 27.3 |
| 1953 | 31 | 27.3 |
| 1954 | 20 | 27.3 |
| 1955 | 51 | 27.3 |
| 1956 | 16 | 27.3 |
| 1965 | 12 | 15.3 |
| 1966 | 25 | 15.3 |
| 1967 | 8 | 15.3 |
| 1968 | 16 | 15.3 |
| 1970 | 14 | 14.4 |
| 1971 | 14 | 14.4 |
| 1972 | 11 | 14.4 |
| 1973 | 20 | 14.4 |
| 1974 | 13 | 14.4 |
| 1980 | 17 | 18.7 |
| 1981 | 12 | 18.7 |
| 1983 | 27 | 18.7 |
| Year | First date | Last date |
|---|---|---|
| 1902 | 1902-05-23 | 1902-09-02 |
| 1915 | 1915-04-26 | 1915-09-16 |
| 1919 | 1919-05-29 | 1919-09-08 |
| 1920 | 1920-06-01 | 1920-09-27 |
| 1921 | 1921-05-20 | 1921-09-10 |
| 1922 | 1922-06-07 | 1922-09-10 |
| 1923 | 1923-06-01 | 1923-09-02 |
| 1924 | 1924-07-12 | 1924-08-31 |
| 1925 | 1925-06-01 | 1925-08-30 |
| 1926 | 1926-07-02 | 1926-08-13 |
| 1927 | 1927-05-22 | 1927-09-15 |
| 1928 | 1928-06-13 | 1928-08-16 |
| 1929 | 1929-05-29 | 1929-09-05 |
| 1930 | 1930-05-07 | 1930-09-02 |
| 1931 | 1931-05-29 | 1931-09-22 |
| 1932 | 1932-07-13 | 1932-08-31 |
| 1933 | 1933-06-08 | 1933-09-09 |
| 1934 | 1934-05-21 | 1934-08-19 |
| 1935 | 1935-07-03 | 1935-08-20 |
| 1936 | 1936-05-08 | 1936-09-23 |
| 1937 | 1937-05-31 | 1937-09-24 |
| 1938 | 1938-06-21 | 1938-08-29 |
| 1939 | 1939-05-08 | 1939-09-16 |
| 1940 | 1940-06-04 | 1940-09-20 |
| 1941 | 1941-05-21 | 1941-10-07 |
| 1942 | 1942-05-14 | 1942-09-17 |
| 1943 | 1943-06-03 | 1943-09-06 |
| 1944 | 1944-05-26 | 1944-09-20 |
| 1945 | 1945-06-14 | 1945-09-10 |
| 1946 | 1946-06-24 | 1946-10-06 |
| 1947 | 1947-06-10 | 1947-09-12 |
| 1948 | 1948-06-04 | 1948-09-18 |
| 1949 | 1949-05-05 | 1949-08-27 |
| 1950 | 1950-06-07 | 1950-08-27 |
| 1951 | 1951-05-31 | 1951-10-05 |
| 1952 | 1952-06-15 | 1952-09-14 |
| 1953 | 1953-05-10 | 1953-09-04 |
| 1954 | 1954-06-10 | 1954-09-05 |
| 1955 | 1955-05-04 | 1955-09-19 |
| 1956 | 1956-06-11 | 1956-09-05 |
| 1965 | 1965-06-06 | 1965-09-20 |
| 1966 | 1966-06-06 | 1966-09-02 |
| 1967 | 1967-06-11 | 1967-08-17 |
| 1968 | 1968-06-07 | 1968-08-24 |
| 1970 | 1970-05-01 | 1970-09-24 |
| 1971 | 1971-06-19 | 1971-09-08 |
| 1972 | 1972-07-11 | 1972-09-17 |
| 1973 | 1973-06-11 | 1973-09-05 |
| 1974 | 1974-06-09 | 1974-08-21 |
| 1980 | 1980-05-31 | 1980-09-01 |
| 1981 | 1981-06-15 | 1981-07-19 |
| 1983 | 1983-06-12 | 1983-09-10 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 52 | 53 | 1949 | 27 |
| 35 C (95 F): Days | 19 | 8 | 1955 | 1 |
| 40 C (104 F): Days | 1 | 1 | 1936 | 1 |
| 90 F (32.2 C): Days | 50 | 30 | 1955 | 4 |
| 100 F (37.8 C): Days | 2 | 5 | 1936 | 2 |
| 0 C (32 F): Ice days (max | 52 | 74 | 1940 | 36 |
| 0 C (32 F): Frost days (min | 50 | 151 | 1926 | 123 |
| -10 C (14 F): Days with min | 50 | 51 | 1920 | 25 |
| -20 C (-4 F): Days with min | 18 | 6 | 1934 | 2 |
| 20 C (68 F): Tropical nights (min | 50 | 35 | 1973 | 31 |
| 25 C (77 F): Days with min | 7 | 1 | 1921 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 53 | 33 | 1955 | 28 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 53 | 9 | 1945 | 1 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 16 | 3 | 1954 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 46 | 7 | 1929 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 9 | 2 | 1937 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1902.
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 (2026-10-17).