Pearl River Lock 1 Threshold Days by Year (USC00167161)

5 fixed thresholds counted per year at Pearl River Lock 1 (USC00167161): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Pearl River Lock 1 Thresholds

Pearl River Lock 1: days with 10 mm (0.39 in) or more of precipitation in 33 years, most in 1961 with 61.
Pearl River Lock 1: days with 25 mm (0.98 in) or more of precipitation in 33 years, most in 1961 with 30.
Pearl River Lock 1: days with 50 mm (1.97 in) or more of precipitation in 32 years, most in 1948 with 12.
Pearl River Lock 1: days with 100 mm (3.94 in) or more of precipitation in 21 years, most in 1951 with 3.
5 fixed thresholds have at least one qualifying day at Pearl River Lock 1.

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

33 years with a qualifying day

Days per year at Pearl River Lock 1 with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 61 in 1961.

Days with 10 mm (0.39 in) or more of precipitation per year at Pearl River Lock 1
Year	Days	Decade average
1948	57	57
1951	32	43.2
1952	41	43.2
1953	43	43.2
1954	33	43.2
1955	43	43.2
1956	49	43.2
1957	43	43.2
1958	46	43.2
1959	59	43.2
1960	39	43.8
1961	61	43.8
1962	34	43.8
1964	50	43.8
1965	38	43.8
1966	50	43.8
1967	41	43.8
1968	36	43.8
1969	45	43.8
1970	55	47.6
1971	41	47.6
1972	45	47.6
1974	51	47.6
1975	49	47.6
1976	36	47.6
1977	49	47.6
1978	45	47.6
1979	57	47.6
1980	42	46.4
1981	38	46.4
1982	56	46.4
1983	50	46.4
1984	46	46.4

For each year, a bar from the first to the last day at Pearl River Lock 1 meeting 10 mm (0.39 in).

First to last qualifying date each year at Pearl River Lock 1
Year	First date	Last date
1948	1948-01-13	1948-12-28
1951	1951-01-07	1951-12-20
1952	1952-01-28	1952-12-20
1953	1953-01-18	1953-12-28
1954	1954-01-05	1954-12-28
1955	1955-01-01	1955-12-19
1956	1956-01-22	1956-12-24
1957	1957-02-02	1957-12-28
1958	1958-01-07	1958-12-24
1959	1959-01-16	1959-12-27
1960	1960-01-01	1960-12-25
1961	1961-01-01	1961-12-27
1962	1962-01-01	1962-12-29
1964	1964-01-01	1964-12-12
1965	1965-01-10	1965-12-19
1966	1966-01-03	1966-12-31
1967	1967-01-01	1967-12-31
1968	1968-01-10	1968-12-31
1969	1969-01-18	1969-12-31
1970	1970-01-06	1970-12-31
1971	1971-01-04	1971-12-21
1972	1972-01-02	1972-12-31
1974	1974-01-01	1974-12-20
1975	1975-01-08	1975-12-31
1976	1976-01-07	1976-12-26
1977	1977-01-03	1977-12-30
1978	1978-01-08	1978-12-24
1979	1979-01-02	1979-12-23
1980	1980-01-09	1980-12-10
1981	1981-01-07	1981-12-31
1982	1982-01-03	1982-12-28
1983	1983-01-01	1983-12-29
1984	1984-01-10	1984-12-05

Every Fixed Threshold

Fixed thresholds at Pearl River Lock 1
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	33	61	1961	46
25 mm (0.98 in): Days with 25 mm or more rain	33	30	1961	11
50 mm (1.97 in): Days with 50 mm or more rain	32	12	1948	2
100 mm (3.94 in): Days with 100 mm or more rain	21	3	1951	1
200 mm (7.87 in): Days with 200 mm or more rain	2	1	1958	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1948.

Download the Data

Data for Pearl River Lock 1 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).

Pearl River Lock 1 Threshold Days by Year (USC00167161)

Key Facts for Pearl River Lock 1 Thresholds

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

Every Fixed Threshold

Download the Data

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