Oakville Threshold Days by Year (USC00456011)

15 fixed thresholds counted per year at Oakville (USC00456011): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Oakville Thresholds

Oakville: days with 10 mm (0.39 in) or more of precipitation in 68 years, most in 1968 with 71.
Oakville: days with 25 mm (0.98 in) or more of precipitation in 68 years, most in 1975 with 20.
Oakville: nights with a minimum temperature at or below 0 C (32 F) in 67 years, most in 1970 with 122.
Oakville: days with a maximum temperature at or above 30 C (86 F) in 63 years, most in 1958 with 31.
15 fixed thresholds have at least one qualifying day at Oakville.

Days at or above 30 C (86 F)

63 years with a qualifying day

Days per year at Oakville with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 31 in 1958.

Days at or above 30 C (86 F) per year at Oakville
Year	Days	Decade average
1918	24	20
1919	16	20
1920	16	16.1
1921	2	16.1
1922	17	16.1
1923	22	16.1
1924	16	16.1
1925	16	16.1
1926	24	16.1
1930	10	18.7
1933	17	18.7
1934	14	18.7
1935	18	18.7
1937	17	18.7
1938	30	18.7
1939	25	18.7
1940	27	18.5
1941	19	18.5
1943	16	18.5
1944	16	18.5
1946	13	18.5
1949	20	18.5
1950	11	16.3
1951	16	16.3
1952	20	16.3
1953	9	16.3
1955	12	16.3
1956	20	16.3
1958	31	16.3
1959	11	16.3
1960	14	11
1961	24	11
1962	8	11
1963	6	11
1964	2	11
1966	5	11
1967	22	11
1968	12	11
1969	6	11
1970	13	11.1
1971	10	11.1
1972	17	11.1
1973	8	11.1
1974	18	11.1
1975	7	11.1
1976	1	11.1
1977	15	11.1
1979	11	11.1
1981	18	16.3
1982	15	16.3
1983	6	16.3
1984	10	16.3
1985	25	16.3
1986	20	16.3
1987	21	16.3
1988	19	16.3
1989	13	16.3
1991	12	11
1992	21	11
1993	9	11
1994	8	11
1995	6	11
1997	10	11

For each year, a bar from the first to the last day at Oakville meeting 30 C (86 F).

First to last qualifying date each year at Oakville
Year	First date	Last date
1918	1918-06-05	1918-09-27
1919	1919-07-08	1919-09-14
1920	1920-06-03	1920-09-01
1921	1921-08-06	1921-08-07
1922	1922-05-29	1922-09-11
1923	1923-06-05	1923-09-07
1924	1924-05-11	1924-09-12
1925	1925-05-05	1925-09-23
1926	1926-04-14	1926-09-04
1930	1930-06-15	1930-09-02
1933	1933-06-12	1933-08-26
1934	1934-04-18	1934-09-03
1935	1935-06-04	1935-09-06
1937	1937-06-01	1937-09-14
1938	1938-05-20	1938-08-30
1939	1939-05-12	1939-09-21
1940	1940-05-17	1940-09-23
1941	1941-05-22	1941-08-19
1943	1943-06-29	1943-09-24
1944	1944-06-09	1944-09-10
1946	1946-05-02	1946-08-22
1949	1949-05-11	1949-09-28
1950	1950-06-03	1950-09-21
1951	1951-06-27	1951-09-16
1952	1952-05-17	1952-10-06
1953	1953-05-05	1953-09-04
1955	1955-06-07	1955-09-05
1956	1956-05-16	1956-09-06
1958	1958-05-14	1958-09-07
1959	1959-07-09	1959-08-06
1960	1960-07-05	1960-09-10
1961	1961-05-19	1961-09-13
1962	1962-07-21	1962-09-05
1963	1963-05-19	1963-09-09
1964	1964-08-23	1964-08-24
1966	1966-06-16	1966-09-05
1967	1967-06-17	1967-09-28
1968	1968-06-26	1968-08-11
1969	1969-05-09	1969-07-25
1970	1970-06-02	1970-08-23
1971	1971-05-12	1971-08-12
1972	1972-05-28	1972-09-04
1973	1973-05-14	1973-09-11
1974	1974-07-28	1974-09-25
1975	1975-07-05	1975-09-22
1976	1976-09-21	1976-09-21
1977	1977-06-18	1977-08-18
1979	1979-06-02	1979-09-15
1981	1981-07-02	1981-09-15
1982	1982-06-10	1982-09-02
1983	1983-05-23	1983-08-13
1984	1984-05-28	1984-08-26
1985	1985-05-16	1985-08-25
1986	1986-05-30	1986-09-06
1987	1987-04-27	1987-10-01
1988	1988-05-11	1988-09-13
1989	1989-06-03	1989-09-24
1991	1991-07-02	1991-10-11
1992	1992-05-24	1992-08-26
1993	1993-05-24	1993-09-09
1994	1994-07-19	1994-09-22
1995	1995-06-27	1995-09-14
1997	1997-05-11	1997-09-24

Every Fixed Threshold

Fixed thresholds at Oakville
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	63	31	1958	10
35 C (95 F): Days	41	8	1939	1
40 C (104 F): Days	2	3	1941	1
90 F (32.2 C): Days	60	16	1939	1
100 F (37.8 C): Days	17	3	1941	1
0 C (32 F): Ice days (max	38	11	1930	1
0 C (32 F): Frost days (min	67	122	1970	81
-10 C (14 F): Days with min	40	13	1972	2
-20 C (-4 F): Days with min	3	3	1930	1
10 mm (0.39 in): Days with 10 mm or more rain	68	71	1968	65
25 mm (0.98 in): Days with 25 mm or more rain	68	20	1975	13
50 mm (1.97 in): Days with 50 mm or more rain	46	5	1933	2
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1919	1
10 cm (3.9 in): Days with 10 cm or more snowfall	14	6	1971	1
25 cm (9.8 in): Days with 25 cm or more snowfall	3	2	1971	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1918.

Download the Data

Data for Oakville threshold days by year: CSV or JSON. Field meanings are on the data page.

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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Oakville Threshold Days by Year (USC00456011)

Key Facts for Oakville Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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