Yalleroi Threshold Days by Year (ASN00035084)

4 fixed thresholds counted per year at Yalleroi (ASN00035084): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Yalleroi Thresholds

Yalleroi: days with 10 mm (0.39 in) or more of precipitation in 65 years, most in 1950 with 32.
Yalleroi: days with 25 mm (0.98 in) or more of precipitation in 65 years, most in 1906 with 15.
Yalleroi: days with 50 mm (1.97 in) or more of precipitation in 53 years, most in 1906 with 8.
Yalleroi: days with 100 mm (3.94 in) or more of precipitation in 13 years, most in 1906 with 2.
4 fixed thresholds have at least one qualifying day at Yalleroi.

Days with 10 mm (0.39 in) or more of precipitation

65 years with a qualifying day

Days per year at Yalleroi with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 32 in 1950.

Days with 10 mm (0.39 in) or more of precipitation per year at Yalleroi
Year	Days	Decade average
1901	15	16.2
1904	18	16.2
1905	10	16.2
1906	25	16.2
1907	13	16.2
1916	17	21.5
1917	26	21.5
1935	11	13.8
1936	26	13.8
1937	8	13.8
1938	9	13.8
1939	15	13.8
1940	16	14.4
1941	25	14.4
1942	17	14.4
1943	14	14.4
1944	8	14.4
1945	12	14.4
1946	10	14.4
1947	15	14.4
1948	9	14.4
1949	18	14.4
1950	32	18.7
1951	12	18.7
1952	16	18.7
1953	9	18.7
1954	31	18.7
1955	23	18.7
1956	25	18.7
1957	10	18.7
1958	14	18.7
1959	15	18.7
1960	13	15
1961	18	15
1962	23	15
1963	21	15
1964	14	15
1965	13	15
1966	8	15
1967	15	15
1968	15	15
1969	10	15
1970	12	14.9
1971	11	14.9
1972	10	14.9
1973	20	14.9
1974	22	14.9
1975	14	14.9
1976	11	14.9
1977	15	14.9
1978	23	14.9
1979	11	14.9
1980	19	15.4
1981	20	15.4
1982	9	15.4
1983	26	15.4
1986	13	15.4
1987	15	15.4
1988	8	15.4
1989	13	15.4
1990	14	11
1991	11	11
1993	12	11
1994	8	11
1995	10	11

For each year, a bar from the first to the last day at Yalleroi meeting 10 mm (0.39 in).

First to last qualifying date each year at Yalleroi
Year	First date	Last date
1901	1901-01-07	1901-11-08
1904	1904-01-03	1904-12-18
1905	1905-01-14	1905-12-15
1906	1906-01-29	1906-12-23
1907	1907-02-02	1907-12-28
1916	1916-03-07	1916-12-02
1917	1917-01-04	1917-12-13
1935	1935-01-12	1935-12-07
1936	1936-01-06	1936-12-28
1937	1937-02-10	1937-11-25
1938	1938-01-10	1938-11-07
1939	1939-01-21	1939-12-23
1940	1940-01-27	1940-12-27
1941	1941-01-04	1941-12-23
1942	1942-02-22	1942-12-29
1943	1943-01-13	1943-12-28
1944	1944-02-08	1944-12-18
1945	1945-01-06	1945-12-08
1946	1946-01-02	1946-12-20
1947	1947-02-06	1947-12-22
1948	1948-01-01	1948-12-31
1949	1949-01-10	1949-11-18
1950	1950-01-05	1950-12-31
1951	1951-01-01	1951-12-29
1952	1952-01-30	1952-10-26
1953	1953-01-03	1953-12-15
1954	1954-01-02	1954-12-20
1955	1955-01-10	1955-12-20
1956	1956-01-12	1956-12-24
1957	1957-01-10	1957-12-30
1958	1958-01-18	1958-12-27
1959	1959-01-25	1959-12-18
1960	1960-02-08	1960-12-26
1961	1961-01-03	1961-12-30
1962	1962-01-05	1962-12-30
1963	1963-01-01	1963-11-11
1964	1964-01-02	1964-12-27
1965	1965-02-15	1965-12-20
1966	1966-01-06	1966-11-08
1967	1967-01-20	1967-12-30
1968	1968-01-12	1968-12-25
1969	1969-02-06	1969-12-24
1970	1970-01-16	1970-12-23
1971	1971-02-06	1971-12-27
1972	1972-01-06	1972-12-09
1973	1973-01-11	1973-12-27
1974	1974-01-01	1974-11-17
1975	1975-01-03	1975-12-20
1976	1976-01-12	1976-12-21
1977	1977-01-06	1977-12-09
1978	1978-01-12	1978-12-04
1979	1979-01-11	1979-12-17
1980	1980-01-06	1980-12-15
1981	1981-01-02	1981-12-24
1982	1982-01-05	1982-12-27
1983	1983-01-03	1983-12-03
1986	1986-01-10	1986-12-02
1987	1987-01-01	1987-12-29
1988	1988-01-22	1988-12-26
1989	1989-02-03	1989-12-14
1990	1990-02-01	1990-06-06
1991	1991-01-05	1991-12-11
1993	1993-02-17	1993-12-18
1994	1994-02-02	1994-10-16
1995	1995-01-05	1995-12-30

Every Fixed Threshold

Fixed thresholds at Yalleroi
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	65	32	1950	10
25 mm (0.98 in): Days with 25 mm or more rain	65	15	1906	4
50 mm (1.97 in): Days with 50 mm or more rain	53	8	1906	1
100 mm (3.94 in): Days with 100 mm or more rain	13	2	1906	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1901.

Download the Data

Data for Yalleroi 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).

Yalleroi Threshold Days by Year (ASN00035084)

Key Facts for Yalleroi Thresholds

Days with 10 mm (0.39 in) or more of precipitation

Every Fixed Threshold

Download the Data

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