Y Lightning Rch Threshold Days by Year

12 fixed thresholds counted per year at Y Lightning Rch (USC00029562): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Y Lightning Rch Thresholds

Y Lightning Rch: days with 10 mm (0.39 in) or more of precipitation in 67 years, most in 1983 with 22.
Y Lightning Rch: days with 25 mm (0.98 in) or more of precipitation in 58 years, most in 2000 with 8.
Y Lightning Rch: days with 50 mm (1.97 in) or more of precipitation in 17 years, most in 1987 with 2.
Y Lightning Rch: days with 10 cm (3.9 in) or more of snowfall in 11 years, most in 1949 with 2.
12 fixed thresholds have at least one qualifying day at Y Lightning Rch.

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

67 years with a qualifying day

Days per year at Y Lightning Rch with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 22 in 1983.

Days with 10 mm (0.39 in) or more of precipitation per year at Y Lightning Rch
Year	Days	Decade average
1939	8	8
1940	15	9.6
1942	7	9.6
1947	4	9.6
1948	9	9.6
1949	13	9.6
1950	5	9.8
1951	10	9.8
1952	13	9.8
1953	4	9.8
1954	13	9.8
1955	11	9.8
1956	6	9.8
1957	9	9.8
1958	14	9.8
1959	13	9.8
1960	10	12.9
1961	15	12.9
1962	9	12.9
1964	11	12.9
1965	14	12.9
1966	19	12.9
1967	15	12.9
1968	13	12.9
1969	10	12.9
1970	10	12
1971	13	12
1972	11	12
1973	9	12
1974	15	12
1975	10	12
1976	10	12
1977	11	12
1978	19	12
1979	12	12
1980	4	14.2
1981	11	14.2
1982	15	14.2
1983	22	14.2
1984	18	14.2
1985	17	14.2
1986	16	14.2
1987	17	14.2
1988	14	14.2
1989	8	14.2
1990	17	11.6
1991	15	11.6
1992	16	11.6
1993	12	11.6
1994	11	11.6
1995	8	11.6
1996	7	11.6
1997	11	11.6
1998	10	11.6
1999	9	11.6
2000	14	11.6
2001	8	11.6
2002	8	11.6
2003	8	11.6
2004	11	11.6
2005	11	11.6
2006	13	11.6
2007	13	11.6
2008	18	11.6
2010	13	10.7
2011	8	10.7
2012	11	10.7

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

First to last qualifying date each year at Y Lightning Rch
Year	First date	Last date
1939	1939-02-17	1939-11-30
1940	1940-02-01	1940-12-13
1942	1942-02-16	1942-09-04
1947	1947-01-02	1947-11-13
1948	1948-07-21	1948-12-27
1949	1949-01-25	1949-12-10
1950	1950-02-12	1950-07-30
1951	1951-07-02	1951-12-31
1952	1952-01-13	1952-12-18
1953	1953-03-01	1953-07-12
1954	1954-03-22	1954-08-31
1955	1955-06-12	1955-08-22
1956	1956-06-30	1956-08-24
1957	1957-03-19	1957-10-31
1958	1958-03-04	1958-10-05
1959	1959-02-09	1959-11-14
1960	1960-06-23	1960-12-29
1961	1961-01-20	1961-12-16
1962	1962-01-25	1962-12-18
1964	1964-02-05	1964-11-16
1965	1965-01-10	1965-12-23
1966	1966-01-17	1966-11-09
1967	1967-07-03	1967-12-20
1968	1968-01-07	1968-08-31
1969	1969-02-13	1969-09-11
1970	1970-03-01	1970-12-27
1971	1971-02-20	1971-12-18
1972	1972-07-15	1972-10-19
1973	1973-01-01	1973-09-20
1974	1974-01-09	1974-10-29
1975	1975-01-29	1975-11-28
1976	1976-02-09	1976-11-13
1977	1977-01-30	1977-10-09
1978	1978-01-15	1978-12-30
1979	1979-01-17	1979-08-15
1980	1980-07-12	1980-08-14
1981	1981-01-07	1981-10-29
1982	1982-03-12	1982-12-30
1983	1983-01-29	1983-12-01
1984	1984-01-01	1984-11-23
1985	1985-01-23	1985-11-25
1986	1986-02-06	1986-12-16
1987	1987-02-25	1987-12-17
1988	1988-01-05	1988-10-14
1989	1989-01-03	1989-10-04
1990	1990-01-30	1990-12-24
1991	1991-01-06	1991-12-20
1992	1992-01-10	1992-12-27
1993	1993-01-10	1993-11-15
1994	1994-02-08	1994-12-25
1995	1995-01-05	1995-10-31
1996	1996-02-13	1996-09-01
1997	1997-01-07	1997-12-22
1998	1998-02-05	1998-11-29
1999	1999-07-04	1999-08-10
2000	2000-06-02	2000-11-07
2001	2001-01-10	2001-09-13
2002	2002-02-03	2002-12-03
2003	2003-02-26	2003-11-13
2004	2004-01-15	2004-12-30
2005	2005-01-04	2005-09-08
2006	2006-06-22	2006-10-09
2007	2007-01-19	2007-12-01
2008	2008-01-28	2008-11-27
2010	2010-01-20	2010-08-28
2011	2011-07-24	2011-12-14
2012	2012-07-08	2012-12-14

Every Fixed Threshold

Fixed thresholds at Y Lightning Rch
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	1	164	2012	164
35 C (95 F): Days	1	65	2012	65
40 C (104 F): Days	1	2	2012	2
90 F (32.2 C): Days	1	117	2012	117
100 F (37.8 C): Days	1	19	2012	19
0 C (32 F): Frost days (min	1	40	2012	40
20 C (68 F): Tropical nights (min	1	16	2012	16
10 mm (0.39 in): Days with 10 mm or more rain	67	22	1983	11
25 mm (0.98 in): Days with 25 mm or more rain	58	8	2000	3
50 mm (1.97 in): Days with 50 mm or more rain	17	2	1987	1
10 cm (3.9 in): Days with 10 cm or more snowfall	11	2	1949	1
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1978	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2012.

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Data for Y Lightning Rch 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).

Y Lightning Rch Threshold Days by Year

Key Facts for Y Lightning Rch Thresholds

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

Every Fixed Threshold

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