Welland Threshold Days by Year (CA006139445)

18 fixed thresholds counted per year at Welland (CA006139445): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Welland Thresholds

Welland: days with a maximum temperature at or above 30 C (86 F) in 98 years, most in 1949 with 53.
Welland: days with a maximum temperature at or below 0 C (32 F) in 98 years, most in 1875 with 88.
Welland: nights with a minimum temperature at or below 0 C (32 F) in 98 years, most in 1875 with 179.
Welland: nights with a minimum temperature at or below -10 C (14 F) in 98 years, most in 1875 with 78.
18 fixed thresholds have at least one qualifying day at Welland.

Days at or above 30 C (86 F)

98 years with a qualifying day

Days per year at Welland with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 53 in 1949.

Days at or above 30 C (86 F) per year at Welland
Year	Days	Decade average
1873	7	14.8
1874	15	14.8
1875	4	14.8
1876	20	14.8
1877	10	14.8
1878	33	14.8
1883	1	9.8
1884	20	9.8
1885	9	9.8
1886	9	9.8
1893	13	19.9
1894	22	19.9
1895	22	19.9
1896	18	19.9
1897	17	19.9
1898	24	19.9
1899	23	19.9
1900	35	21.2
1901	42	21.2
1902	11	21.2
1903	10	21.2
1905	11	21.2
1906	27	21.2
1907	10	21.2
1908	33	21.2
1909	12	21.2
1910	5	19.4
1911	23	19.4
1912	12	19.4
1913	14	19.4
1914	24	19.4
1915	7	19.4
1916	30	19.4
1917	18	19.4
1918	23	19.4
1919	38	19.4
1920	7	13.4
1921	32	13.4
1922	10	13.4
1923	23	13.4
1924	8	13.4
1925	16	13.4
1926	6	13.4
1927	7	13.4
1928	12	13.4
1929	13	13.4
1930	21	23.3
1931	22	23.3
1932	7	23.3
1933	29	23.3
1934	33	23.3
1935	22	23.3
1936	30	23.3
1937	22	23.3
1938	19	23.3
1939	28	23.3
1940	21	33.5
1941	32	33.5
1942	11	33.5
1943	24	33.5
1944	44	33.5
1945	35	33.5
1946	34	33.5
1947	46	33.5
1948	35	33.5
1949	53	33.5
1950	16	18.1
1951	13	18.1
1952	31	18.1
1953	20	18.1
1954	9	18.1
1955	30	18.1
1956	3	18.1
1958	5	18.1
1959	36	18.1
1960	9	9.7
1961	5	9.7
1962	10	9.7
1963	14	9.7
1964	16	9.7
1965	5	9.7
1966	16	9.7
1967	6	9.7
1968	10	9.7
1969	6	9.7
1970	13	10.6
1971	8	10.6
1972	8	10.6
1973	17	10.6
1974	4	10.6
1975	17	10.6
1976	3	10.6
1977	9	10.6
1978	15	10.6
1979	12	10.6
1980	9	9.3
1981	4	9.3
1983	15	9.3

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

First to last qualifying date each year at Welland
Year	First date	Last date
1873	1873-06-28	1873-07-31
1874	1874-05-30	1874-09-14
1875	1875-06-11	1875-08-11
1876	1876-05-25	1876-08-31
1877	1877-06-15	1877-08-23
1878	1878-06-03	1878-09-07
1883	1883-08-22	1883-08-22
1884	1884-06-07	1884-09-10
1885	1885-07-06	1885-08-12
1886	1886-06-15	1886-09-08
1893	1893-06-19	1893-08-23
1894	1894-06-11	1894-09-04
1895	1895-05-04	1895-09-22
1896	1896-05-10	1896-09-11
1897	1897-07-02	1897-09-10
1898	1898-06-07	1898-09-15
1899	1899-06-05	1899-08-31
1900	1900-06-06	1900-09-11
1901	1901-06-05	1901-09-07
1902	1902-05-22	1902-08-31
1903	1903-07-01	1903-09-15
1905	1905-06-17	1905-08-10
1906	1906-05-24	1906-09-12
1907	1907-06-22	1907-08-19
1908	1908-05-28	1908-09-10
1909	1909-06-27	1909-09-14
1910	1910-06-22	1910-07-24
1911	1911-05-19	1911-08-10
1912	1912-07-02	1912-09-10
1913	1913-06-16	1913-09-02
1914	1914-05-29	1914-08-23
1915	1915-06-07	1915-09-16
1916	1916-07-11	1916-09-06
1917	1917-07-07	1917-08-21
1918	1918-06-30	1918-08-25
1919	1919-06-01	1919-09-08
1920	1920-06-10	1920-08-07
1921	1921-05-20	1921-09-10
1922	1922-07-10	1922-09-10
1923	1923-06-18	1923-09-01
1924	1924-07-21	1924-09-01
1925	1925-06-02	1925-09-11
1926	1926-07-06	1926-08-06
1927	1927-06-30	1927-10-02
1928	1928-06-13	1928-08-28
1929	1929-05-30	1929-09-05
1930	1930-05-07	1930-09-14
1931	1931-06-14	1931-09-21
1932	1932-06-20	1932-09-01
1933	1933-06-06	1933-09-08
1934	1934-05-31	1934-09-25
1935	1935-06-02	1935-08-20
1936	1936-05-10	1936-09-23
1937	1937-06-25	1937-09-03
1938	1938-06-20	1938-08-20
1939	1939-05-27	1939-09-16
1940	1940-06-07	1940-08-18
1941	1941-05-21	1941-09-16
1942	1942-05-01	1942-09-17
1943	1943-06-04	1943-09-06
1944	1944-05-26	1944-08-22
1945	1945-06-14	1945-09-10
1946	1946-06-16	1946-10-07
1947	1947-06-10	1947-09-12
1948	1948-06-03	1948-09-13
1949	1949-06-03	1949-08-27
1950	1950-06-07	1950-08-27
1951	1951-06-17	1951-10-05
1952	1952-06-15	1952-09-14
1953	1953-06-20	1953-09-04
1954	1954-06-12	1954-08-24
1955	1955-06-06	1955-09-16
1956	1956-06-15	1956-07-01
1958	1958-07-05	1958-08-03
1959	1959-06-09	1959-09-28
1960	1960-06-28	1960-09-08
1961	1961-06-13	1961-09-04
1962	1962-05-17	1962-08-31
1963	1963-06-25	1963-07-28
1964	1964-06-23	1964-09-10
1965	1965-08-06	1965-09-22
1966	1966-06-23	1966-09-02
1967	1967-06-11	1967-06-16
1968	1968-06-09	1968-08-24
1969	1969-06-12	1969-08-25
1970	1970-06-10	1970-09-24
1971	1971-06-20	1971-09-06
1972	1972-07-12	1972-08-24
1973	1973-06-26	1973-09-05
1974	1974-07-04	1974-08-21
1975	1975-05-22	1975-08-03
1976	1976-06-06	1976-06-15
1977	1977-05-21	1977-09-01
1978	1978-05-27	1978-08-19
1979	1979-06-09	1979-09-01
1980	1980-07-11	1980-08-29
1981	1981-06-15	1981-07-11
1983	1983-06-13	1983-09-10

Every Fixed Threshold

Fixed thresholds at Welland
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	98	53	1949	15
35 C (95 F): Days	24	5	1936	1
90 F (32.2 C): Days	83	19	1949	2
100 F (37.8 C): Days	3	1	1911	1
0 C (32 F): Ice days (max	98	88	1875	46
0 C (32 F): Frost days (min	98	179	1875	138
-10 C (14 F): Days with min	98	78	1875	33
-20 C (-4 F): Days with min	82	25	1885	4
-30 C (-22 F): Days with min	3	1	1873	1
20 C (68 F): Tropical nights (min	97	31	1959	13
25 C (77 F): Days with min	6	1	1897	1
10 mm (0.39 in): Days with 10 mm or more rain	89	49	1977	35
25 mm (0.98 in): Days with 25 mm or more rain	88	12	1893	5
50 mm (1.97 in): Days with 50 mm or more rain	31	2	1894	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1937	1
10 cm (3.9 in): Days with 10 cm or more snowfall	87	14	1900	2
25 cm (9.8 in): Days with 25 cm or more snowfall	33	4	1893	1
50 cm (19.7 in): Days with 50 cm or more snowfall	6	1	1894	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1873.

Download the Data

Data for Welland 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Welland Threshold Days by Year (CA006139445)

Key Facts for Welland Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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