Ottawa Macdonald-Cartier Int'l Threshold Days by Year (CA006106000)
16 fixed thresholds counted per year at Ottawa Macdonald-Cartier Int'l (CA006106000): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Ottawa Macdonald-Cartier Int'l Thresholds
- Ottawa Macdonald-Cartier Int'l: days with a maximum temperature at or above 30 C (86 F) in 45 years, most in 1955 with 40.
- Ottawa Macdonald-Cartier Int'l: days with a maximum temperature at or below 0 C (32 F) in 45 years, most in 1940 with 107.
- Ottawa Macdonald-Cartier Int'l: nights with a minimum temperature at or below 0 C (32 F) in 45 years, most in 1939 with 187.
- Ottawa Macdonald-Cartier Int'l: nights with a minimum temperature at or below -10 C (14 F) in 45 years, most in 1940 with 98.
- 16 fixed thresholds have at least one qualifying day at Ottawa Macdonald-Cartier Int'l.
Days at or above 30 C (86 F)
45 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1939 | 17 | 17 |
| 1940 | 17 | 20.3 |
| 1941 | 23 | 20.3 |
| 1942 | 16 | 20.3 |
| 1943 | 15 | 20.3 |
| 1944 | 28 | 20.3 |
| 1945 | 16 | 20.3 |
| 1946 | 17 | 20.3 |
| 1947 | 25 | 20.3 |
| 1948 | 10 | 20.3 |
| 1949 | 36 | 20.3 |
| 1950 | 9 | 14.3 |
| 1951 | 8 | 14.3 |
| 1952 | 15 | 14.3 |
| 1953 | 21 | 14.3 |
| 1954 | 4 | 14.3 |
| 1955 | 40 | 14.3 |
| 1956 | 5 | 14.3 |
| 1957 | 10 | 14.3 |
| 1958 | 7 | 14.3 |
| 1959 | 24 | 14.3 |
| 1960 | 12 | 11.1 |
| 1961 | 9 | 11.1 |
| 1962 | 10 | 11.1 |
| 1963 | 18 | 11.1 |
| 1964 | 12 | 11.1 |
| 1965 | 9 | 11.1 |
| 1966 | 17 | 11.1 |
| 1967 | 6 | 11.1 |
| 1968 | 7 | 11.1 |
| 1969 | 11 | 11.1 |
| 1970 | 15 | 12.2 |
| 1971 | 10 | 12.2 |
| 1972 | 4 | 12.2 |
| 1973 | 16 | 12.2 |
| 1974 | 9 | 12.2 |
| 1975 | 22 | 12.2 |
| 1976 | 12 | 12.2 |
| 1977 | 12 | 12.2 |
| 1978 | 10 | 12.2 |
| 1979 | 12 | 12.2 |
| 1980 | 6 | 12.8 |
| 1981 | 9 | 12.8 |
| 1982 | 8 | 12.8 |
| 1983 | 28 | 12.8 |
| Year | First date | Last date |
|---|---|---|
| 1939 | 1939-05-08 | 1939-09-16 |
| 1940 | 1940-06-04 | 1940-08-18 |
| 1941 | 1941-05-21 | 1941-09-22 |
| 1942 | 1942-05-14 | 1942-09-18 |
| 1943 | 1943-06-04 | 1943-08-23 |
| 1944 | 1944-05-04 | 1944-08-16 |
| 1945 | 1945-06-24 | 1945-09-08 |
| 1946 | 1946-06-23 | 1946-09-19 |
| 1947 | 1947-06-11 | 1947-09-11 |
| 1948 | 1948-06-29 | 1948-09-06 |
| 1949 | 1949-06-03 | 1949-08-27 |
| 1950 | 1950-06-08 | 1950-07-13 |
| 1951 | 1951-07-07 | 1951-09-13 |
| 1952 | 1952-06-17 | 1952-09-11 |
| 1953 | 1953-05-10 | 1953-09-04 |
| 1954 | 1954-07-13 | 1954-08-25 |
| 1955 | 1955-06-04 | 1955-09-19 |
| 1956 | 1956-06-12 | 1956-08-09 |
| 1957 | 1957-06-15 | 1957-08-09 |
| 1958 | 1958-07-01 | 1958-08-07 |
| 1959 | 1959-06-05 | 1959-09-10 |
| 1960 | 1960-06-28 | 1960-09-08 |
| 1961 | 1961-07-12 | 1961-09-11 |
| 1962 | 1962-05-17 | 1962-08-31 |
| 1963 | 1963-06-04 | 1963-07-28 |
| 1964 | 1964-05-22 | 1964-07-28 |
| 1965 | 1965-05-26 | 1965-09-22 |
| 1966 | 1966-06-23 | 1966-08-09 |
| 1967 | 1967-06-03 | 1967-08-17 |
| 1968 | 1968-07-01 | 1968-07-22 |
| 1969 | 1969-06-12 | 1969-08-31 |
| 1970 | 1970-06-02 | 1970-08-16 |
| 1971 | 1971-05-19 | 1971-08-19 |
| 1972 | 1972-05-23 | 1972-07-21 |
| 1973 | 1973-07-07 | 1973-09-05 |
| 1974 | 1974-06-10 | 1974-08-23 |
| 1975 | 1975-05-20 | 1975-08-10 |
| 1976 | 1976-04-18 | 1976-08-22 |
| 1977 | 1977-05-17 | 1977-09-01 |
| 1978 | 1978-05-25 | 1978-08-15 |
| 1979 | 1979-05-09 | 1979-08-04 |
| 1980 | 1980-06-24 | 1980-08-24 |
| 1981 | 1981-06-16 | 1981-08-02 |
| 1982 | 1982-07-07 | 1982-07-22 |
| 1983 | 1983-06-12 | 1983-09-20 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 45 | 40 | 1955 | 28 |
| 35 C (95 F): Days | 14 | 7 | 1944 | 1 |
| 90 F (32.2 C): Days | 38 | 19 | 1955 | 12 |
| 100 F (37.8 C): Days | 1 | 2 | 1944 | 2 |
| 0 C (32 F): Ice days (max | 45 | 107 | 1940 | 69 |
| 0 C (32 F): Frost days (min | 45 | 187 | 1939 | 162 |
| -10 C (14 F): Days with min | 45 | 98 | 1940 | 62 |
| -20 C (-4 F): Days with min | 45 | 38 | 1943 | 18 |
| -30 C (-22 F): Days with min | 21 | 5 | 1943 | 1 |
| 20 C (68 F): Tropical nights (min | 42 | 15 | 1955 | 4 |
| 25 C (77 F): Days with min | 1 | 1 | 1955 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 45 | 37 | 1952 | 30 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 45 | 11 | 1973 | 7 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 13 | 2 | 1945 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 45 | 14 | 1971 | 6 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 14 | 3 | 1971 | 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 (2026-10-17).