Bon Wier Threshold Days by Year (USC00410917)

14 fixed thresholds counted per year at Bon Wier (USC00410917): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Bon Wier Thresholds

Bon Wier: days with 10 mm (0.39 in) or more of precipitation in 56 years, most in 1941 with 53.
Bon Wier: days with 25 mm (0.98 in) or more of precipitation in 56 years, most in 1940 with 29.
Bon Wier: days with 50 mm (1.97 in) or more of precipitation in 56 years, most in 1935 with 13.
Bon Wier: days with 100 mm (3.94 in) or more of precipitation in 26 years, most in 1940 with 5.
14 fixed thresholds have at least one qualifying day at Bon Wier.

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

56 years with a qualifying day

Days per year at Bon Wier with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 53 in 1941.

Days with 10 mm (0.39 in) or more of precipitation per year at Bon Wier
Year	Days	Decade average
1914	42	38.3
1915	34	38.3
1916	39	38.3
1921	41	36.8
1926	40	36.8
1927	36	36.8
1928	35	36.8
1929	32	36.8
1930	39	41.1
1932	45	41.1
1933	33	41.1
1934	40	41.1
1935	45	41.1
1937	38	41.1
1938	48	41.1
1939	41	41.1
1940	46	44.8
1941	53	44.8
1942	49	44.8
1943	38	44.8
1948	32	44.8
1949	51	44.8
1950	34	36.3
1951	33	36.3
1952	31	36.3
1953	42	36.3
1954	26	36.3
1955	41	36.3
1956	34	36.3
1957	49	36.3
1958	33	36.3
1959	40	36.3
1960	46	39
1961	43	39
1962	39	39
1963	35	39
1964	40	39
1966	47	39
1967	29	39
1969	33	39
1970	39	43.4
1971	46	43.4
1974	46	43.4
1975	53	43.4
1976	42	43.4
1977	36	43.4
1978	34	43.4
1979	51	43.4
1980	39	44
1981	40	44
1982	48	44
1983	47	44
1984	46	44
1985	42	44
1986	45	44
1987	45	44

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

First to last qualifying date each year at Bon Wier
Year	First date	Last date
1914	1914-01-30	1914-12-29
1915	1915-01-11	1915-12-29
1916	1916-01-01	1916-12-28
1921	1921-01-01	1921-12-24
1926	1926-01-02	1926-12-26
1927	1927-01-13	1927-12-29
1928	1928-02-11	1928-12-20
1929	1929-01-04	1929-12-22
1930	1930-01-08	1930-12-09
1932	1932-01-05	1932-12-30
1933	1933-01-08	1933-12-31
1934	1934-01-04	1934-12-27
1935	1935-01-08	1935-12-31
1937	1937-01-19	1937-12-23
1938	1938-01-01	1938-12-26
1939	1939-01-04	1939-12-26
1940	1940-01-05	1940-12-27
1941	1941-01-14	1941-12-25
1942	1942-01-01	1942-12-27
1943	1943-01-07	1943-12-28
1948	1948-01-13	1948-12-29
1949	1949-01-03	1949-12-13
1950	1950-01-10	1950-12-03
1951	1951-01-03	1951-12-18
1952	1952-01-28	1952-12-30
1953	1953-01-17	1953-12-28
1954	1954-01-10	1954-12-12
1955	1955-01-06	1955-12-18
1956	1956-01-18	1956-12-23
1957	1957-01-23	1957-12-28
1958	1958-01-06	1958-12-23
1959	1959-01-30	1959-12-27
1960	1960-01-01	1960-12-31
1961	1961-01-07	1961-12-18
1962	1962-01-04	1962-12-29
1963	1963-01-11	1963-12-21
1964	1964-01-04	1964-12-11
1966	1966-01-03	1966-12-31
1967	1967-01-14	1967-12-31
1969	1969-02-15	1969-12-31
1970	1970-01-06	1970-12-30
1971	1971-01-04	1971-12-17
1974	1974-01-03	1974-12-28
1975	1975-01-03	1975-12-25
1976	1976-01-03	1976-12-25
1977	1977-01-03	1977-12-29
1978	1978-01-08	1978-12-31
1979	1979-01-01	1979-12-24
1980	1980-01-11	1980-12-09
1981	1981-01-07	1981-12-31
1982	1982-01-12	1982-12-28
1983	1983-01-02	1983-12-22
1984	1984-01-10	1984-12-17
1985	1985-01-01	1985-12-13
1986	1986-01-10	1986-12-23
1987	1987-01-04	1987-12-28

Every Fixed Threshold

Fixed thresholds at Bon Wier
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	2	173	1963	122
35 C (95 F): Days	2	51	1963	31
90 F (32.2 C): Days	2	118	1963	97
100 F (37.8 C): Days	2	8	1963	1
0 C (32 F): Ice days (max	1	2	1963	2
0 C (32 F): Frost days (min	2	68	1963	58
-10 C (14 F): Days with min	2	4	1963	2
20 C (68 F): Tropical nights (min	2	69	1963	67
10 mm (0.39 in): Days with 10 mm or more rain	56	53	1941	45
25 mm (0.98 in): Days with 25 mm or more rain	56	29	1940	20
50 mm (1.97 in): Days with 50 mm or more rain	56	13	1935	11
100 mm (3.94 in): Days with 100 mm or more rain	26	5	1940	2
200 mm (7.87 in): Days with 200 mm or more rain	4	2	1914	1
10 cm (3.9 in): Days with 10 cm or more snowfall	2	1	1948	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1963.

Download the Data

Data for Bon Wier 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).

Bon Wier Threshold Days by Year (USC00410917)

Key Facts for Bon Wier Thresholds

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

Every Fixed Threshold

Download the Data

Related