Wales Threshold Days by Year (USW00026618)

11 fixed thresholds counted per year at Wales (USW00026618): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Wales Thresholds

Wales: days with a maximum temperature at or below 0 C (32 F) in 49 years, most in 1994 with 222.
Wales: nights with a minimum temperature at or below 0 C (32 F) in 49 years, most in 1975 with 283.
Wales: nights with a minimum temperature at or below -10 C (14 F) in 49 years, most in 1955 with 183.
Wales: nights with a minimum temperature at or below -20 C (-4 F) in 49 years, most in 1976 with 127.
11 fixed thresholds have at least one qualifying day at Wales.

Nights at or below 0 C (32 F)

49 years with a qualifying day

Days per year at Wales with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 283 in 1975.

Nights at or below 0 C (32 F) per year at Wales
Year	Days	Decade average
1926	239	247.3
1927	251	247.3
1928	252	247.3
1945	229	252.3
1947	257	252.3
1948	264	252.3
1949	259	252.3
1950	248	253.9
1951	254	253.9
1952	255	253.9
1953	252	253.9
1954	253	253.9
1955	268	253.9
1956	272	253.9
1957	241	253.9
1958	252	253.9
1959	244	253.9
1960	262	254.2
1961	255	254.2
1962	250	254.2
1963	246	254.2
1964	256	254.2
1965	271	254.2
1966	255	254.2
1967	242	254.2
1968	266	254.2
1969	239	254.2
1970	234	257.4
1971	260	257.4
1972	255	257.4
1973	259	257.4
1974	258	257.4
1975	283	257.4
1976	253	257.4
1980	260	249.3
1981	255	249.3
1982	233	249.3
1983	244	249.3
1984	239	249.3
1985	241	249.3
1986	246	249.3
1987	269	249.3
1988	260	249.3
1989	246	249.3
1990	239	253.8
1991	244	253.8
1992	273	253.8
1993	252	253.8
1994	261	253.8

For each year, a bar from the first to the last day at Wales meeting 0 C (32 F).

First to last qualifying date each year at Wales
Year	First date	Last date
1926	1926-01-01	1926-12-31
1927	1927-01-01	1927-12-31
1928	1928-01-01	1928-12-31
1945	1945-01-01	1945-12-31
1947	1947-01-01	1947-12-30
1948	1948-01-01	1948-12-31
1949	1949-01-01	1949-12-31
1950	1950-01-01	1950-12-31
1951	1951-01-01	1951-12-31
1952	1952-01-01	1952-12-27
1953	1953-01-02	1953-12-31
1954	1954-01-01	1954-12-31
1955	1955-01-01	1955-12-31
1956	1956-01-01	1956-12-31
1957	1957-01-01	1957-12-31
1958	1958-01-01	1958-12-31
1959	1959-01-01	1959-12-31
1960	1960-01-01	1960-12-31
1961	1961-01-01	1961-12-31
1962	1962-01-01	1962-12-31
1963	1963-01-01	1963-12-31
1964	1964-01-04	1964-12-31
1965	1965-01-01	1965-12-31
1966	1966-01-01	1966-12-31
1967	1967-01-01	1967-12-31
1968	1968-01-01	1968-12-31
1969	1969-01-01	1969-12-31
1970	1970-01-01	1970-12-31
1971	1971-01-01	1971-12-31
1972	1972-01-01	1972-12-31
1973	1973-01-01	1973-12-31
1974	1974-01-01	1974-12-31
1975	1975-01-01	1975-12-31
1976	1976-01-01	1976-12-31
1980	1980-01-01	1980-12-31
1981	1981-01-01	1981-12-31
1982	1982-01-02	1982-12-31
1983	1983-01-01	1983-12-31
1984	1984-01-01	1984-12-30
1985	1985-01-01	1985-12-31
1986	1986-01-01	1986-12-31
1987	1987-01-01	1987-12-31
1988	1988-01-01	1988-12-31
1989	1989-01-01	1989-12-31
1990	1990-01-01	1990-12-31
1991	1991-01-01	1991-12-31
1992	1992-01-01	1992-12-31
1993	1993-01-01	1993-12-31
1994	1994-01-01	1994-12-31

Every Fixed Threshold

Fixed thresholds at Wales
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
0 C (32 F): Ice days (max	49	222	1994	222
0 C (32 F): Frost days (min	49	283	1975	261
-10 C (14 F): Days with min	49	183	1955	171
-20 C (-4 F): Days with min	49	127	1976	119
-30 C (-22 F): Days with min	48	50	1964	16
-40 C (-40 F): Days with min	6	5	1989	1
10 mm (0.39 in): Days with 10 mm or more rain	46	17	1990	9
25 mm (0.98 in): Days with 25 mm or more rain	21	4	1981	1
50 mm (1.97 in): Days with 50 mm or more rain	1	1	1958	1
10 cm (3.9 in): Days with 10 cm or more snowfall	18	6	1968	3
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1962	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1926.

Download the Data

Data for Wales 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).

Wales Threshold Days by Year (USW00026618)

Key Facts for Wales Thresholds

Nights at or below 0 C (32 F)

Every Fixed Threshold

Download the Data

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